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Thermostat

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Thermostat Housing Assembly for Cadillac Escalade Chevrolet Silverado 1500 GMCThermostat Housing Assembly for Cadillac Escalade Chevrolet Silverado 1500 GMC
A-Premium®Part # APTHA0128
Thermostat Housing Assembly for Cadillac Escalade Chevrolet Silverado 1500 GMC
4.648 Reviews
$20.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 2002 - 2003 Cadillac Escalade, 2002 - 2003 Cadillac Escalade, 2003 - 2003 Cadillac Escalade ESV, 2002 - 2003 Cadillac Escalade EXT, 2002 - 2003 Chevrolet Avalanche 1500, 1998 - 2002 Chevrolet Camaro, 1997 - 2003 Chevrolet Corvette, 2003 - 2003 Chevrolet Express 1500, 2003 - 2003 Chevrolet Express 2500, 2003 - 2003 Chevrolet Express 2500, 2003 - 2003 Chevrolet Express 2500, 2003 - 2003 Chevrolet Express 3500, 2003 - 2003 Chevrolet Express 3500, 2003 - 2003 Chevrolet Express 3500, 1999 - 2003 Chevrolet Silverado 1500, 1999 - 2003 Chevrolet Silverado 1500, 2003 - 2003 Chevrolet Silverado 1500, 2001 - 2003 Chevrolet Silverado 1500 HD, 1999 - 2002 Chevrolet Silverado 2500, 1999 - 2003 Chevrolet Silverado 2500, 2001 - 2003 Chevrolet Silverado 2500 HD, 2001 - 2003 Chevrolet Silverado 3500, 2003 - 2003 Chevrolet SSR, 2000 - 2003 Chevrolet Suburban 1500, 2000 - 2003 Chevrolet Suburban 2500, 2000 - 2003 Chevrolet Tahoe, 2000 - 2003 Chevrolet Tahoe, 2003 - 2003 Chevrolet Trailblazer EXT, 2003 - 2003 Chevrolet W3500 Tiltmaster, 2003 - 2003 Chevrolet W4500 Tiltmaster, 2003 - 2003 GMC Envoy XL, 2003 - 2003 GMC Savana 1500, 2003 - 2003 GMC Savana 2500, 2003 - 2003 GMC Savana 2500, 2003 - 2003 GMC Savana 2500, 2003 - 2003 GMC Savana 3500, 2003 - 2003 GMC Savana 3500, 1999 - 2003 GMC Sierra 1500, 1999 - 2003 GMC Sierra 1500, 2001 - 2003 GMC Sierra 1500, 2001 - 2003 GMC Sierra 1500 HD, 1999 - 2000 GMC Sierra 2500, 1999 - 2003 GMC Sierra 2500, 2001 - 2003 GMC Sierra 2500 HD, 2001 - 2003 GMC Sierra 3500, 2003 - 2003 GMC W4500 Forward, 2000 - 2003 GMC Yukon, 2000 - 2003 GMC Yukon, 2001 - 2003 GMC Yukon, 2000 - 2003 GMC Yukon XL 1500, 2001 - 2003 GMC Yukon XL 1500, 2000 - 2003 GMC Yukon XL 2500, 2003 - 2003 Hummer H2, 2003 - 2003 Isuzu NPR, 2003 - 2003 Isuzu NPR-HD, 1998 - 2002 Pontiac Firebird
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Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialAluminum
Part interchange
902-2700, 379180, 12571261, 8125712610
item #10027T01
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Engine Coolant Thermostat for Ford F-150 F-250 Explorer Mustang E-150 Jeep
A-Premium®Part # APTHE035
Engine Coolant Thermostat for Ford F-150 F-250 Explorer Mustang E-150 Jeep
4.648 Reviews
$22.99
Only 1 item left in stock
Edit ZIP code
2-year warranty
90 days free return
Fits 2013 - 2021 Blue Bird Vision School Bus, 1981 - 1986 Chevrolet Chevette, 1992 - 1993 Ford B-600, 1992 - 1992 Ford B-700, 1992 - 2011 Ford Crown Victoria, 2003 - 2003 Ford E-150, 2003 - 2014 Ford E-150, 2003 - 2014 Ford E-150, 2003 - 2003 Ford E-150 Club Wagon, 2003 - 2005 Ford E-150 Club Wagon, 2003 - 2005 Ford E-150 Club Wagon, 1997 - 2002 Ford E-150 Econoline, 1997 - 2002 Ford E-150 Econoline, 1997 - 2002 Ford E-150 Econoline, 1997 - 2002 Ford E-150 Econoline Club Wagon, 1997 - 2002 Ford E-150 Econoline Club Wagon, 1997 - 2002 Ford E-150 Econoline Club Wagon, 2003 - 2003 Ford E-250, 2003 - 2014 Ford E-250, 2003 - 2014 Ford E-250, 1997 - 2002 Ford E-250 Econoline, 1997 - 2002 Ford E-250 Econoline, 2003 - 2005 Ford E-350 Club Wagon, 1997 - 1998 Ford E-350 Econoline, 1997 - 2002 Ford E-350 Econoline Club Wagon, 1999 - 2010 Ford E-350 Super Duty, 2012 - 2013 Ford E-350 Super Duty, 2016 - 2016 Ford E-350 Super Duty, 2017 - 2019 Ford E-350 Super Duty, 2000 - 2002 Ford E-450 Econoline Super Duty, 2003 - 2004 Ford E-450 Super Duty, 2006 - 2016 Ford E-450 Super Duty, 2009 - 2010 Ford E-450 Super Duty, 2017 - 2019 Ford E-450 Super Duty, 1997 - 1999 Ford Econoline Super Duty, 2000 - 2005 Ford Excursion, 1997 - 2004 Ford Expedition, 1997 - 2014 Ford Expedition, 2002 - 2010 Ford Explorer, 2007 - 2009 Ford Explorer Sport Trac, 2010 - 2010 Ford Explorer Sport Trac, 1997 - 1998 Ford F-150, 1997 - 2010 Ford F-150, 1998 - 2003 Ford F-150, 1999 - 1999 Ford F-150, 2000 - 2003 Ford F-150, 2004 - 2010 Ford F-150, 2005 - 2009 Ford F-150, 2014 - 2014 Ford F-150, 2004 - 2004 Ford F-150 Heritage, 2004 - 2004 Ford F-150 Heritage, 2004 - 2004 Ford F-150 Heritage, 1997 - 1999 Ford F-250, 1997 - 1999 Ford F-250, 1999 - 2010 Ford F-250 Super Duty, 2014 - 2021 Ford F-250 Super Duty, 1999 - 2010 Ford F-350 Super Duty, 2014 - 2018 Ford F-350 Super Duty, 2020 - 2022 Ford F-350 Super Duty, 2017 - 2019 Ford F-450 Super Duty, 2017 - 2019 Ford F-550 Super Duty, 1993 - 1993 Ford F-600, 2015 - 2019 Ford F-650, 1992 - 1992 Ford F-700, 2016 - 2019 Ford F-750, 1989 - 1989 Ford F-800, 1989 - 1989 Ford F-800, 1987 - 1987 Ford LN7000, 1988 - 1989 Ford LN8000, 1996 - 1999 Ford Mustang, 2000 - 2000 Ford Mustang, 2001 - 2001 Ford Mustang, 2002 - 2002 Ford Mustang, 2003 - 2004 Ford Mustang, 2007 - 2010 Ford Mustang, 1996 - 1998 Ford Windstar, 1980 - 1983 Jeep DJ5, 2002 - 2002 Lincoln Blackwood, 2006 - 2008 Lincoln Mark LT, 1998 - 2014 Lincoln Navigator, 2003 - 2011 Lincoln Town Car, 1994 - 1997 Mercury Cougar, 1992 - 2011 Mercury Grand Marquis, 2005 - 2006 Mercury Monterey, 2002 - 2010 Mercury Mountaineer, 1989 - 1989 Peugeot 405, 1990 - 1991 Peugeot 405, 1981 - 1986 Pontiac Acadian
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Vehicle: Pontiac
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DV4S
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Engine Coolant Thermostat for Dodge Grand Caravan Charger Mazda CX-5 Chevy 71℃
A-Premium®Part # APTHE024
Engine Coolant Thermostat for Dodge Grand Caravan Charger Mazda CX-5 Chevy 71℃
4.648 Reviews
$20.99
Only 1 item left in stock
Edit ZIP code
2-year warranty
90 days free return
Fits 1976 - 1977 Chevrolet Chevette, 1976 - 1980 Chevrolet Chevette, 1982 - 1987 Chevrolet Chevette, 1984 - 1989 Chrysler Daytona, 1987 - 1993 Chrysler Daytona, 1992 - 1993 Chrysler Daytona, 1988 - 1992 Chrysler Dynasty, 1991 - 1992 Chrysler Dynasty, 1983 - 1984 Chrysler E Class, 1990 - 1991 Chrysler Imperial, 1991 - 1992 Chrysler Imperial, 1984 - 1986 Chrysler Laser, 1986 - 1986 Chrysler Laser, 1982 - 1990 Chrysler LeBaron, 1986 - 1994 Chrysler LeBaron, 1993 - 1993 Chrysler LeBaron, 1983 - 1988 Chrysler New Yorker, 1986 - 1987 Chrysler New Yorker, 1990 - 1992 Chrysler New Yorker, 1990 - 1992 Chrysler New Yorker, 1991 - 1992 Chrysler New Yorker, 1992 - 1992 Chrysler New Yorker, 1982 - 1988 Chrysler Town & Country, 1986 - 1988 Chrysler Town & Country, 1990 - 1990 Chrysler Town & Country, 1990 - 1992 Chrysler Town & Country, 1982 - 1983 Dodge 400, 1983 - 1988 Dodge 600, 1986 - 1988 Dodge 600, 1981 - 1989 Dodge Aries, 1986 - 1989 Dodge Aries, 1984 - 1987 Dodge Caravan, 1988 - 1995 Dodge Caravan, 1990 - 1992 Dodge Caravan, 1983 - 1986 Dodge Charger, 1983 - 1987 Dodge Charger, 1987 - 1988 Dodge Dakota, 1989 - 1995 Dodge Dakota, 1984 - 1990 Dodge Daytona, 1986 - 1993 Dodge Daytona, 1992 - 1993 Dodge Daytona, 1988 - 1993 Dodge Dynasty, 1990 - 1992 Dodge Dynasty, 1987 - 1989 Dodge Grand Caravan, 1990 - 1992 Dodge Grand Caravan, 1985 - 1989 Dodge Lancer, 1986 - 1989 Dodge Lancer, 1984 - 1987 Dodge Mini Ram, 1987 - 1988 Dodge Mini Ram, 1981 - 1990 Dodge Omni, 1984 - 1984 Dodge Omni, 1982 - 1984 Dodge Rampage, 1987 - 1994 Dodge Shadow, 1988 - 1994 Dodge Shadow, 1989 - 1995 Dodge Spirit, 1991 - 1992 Dodge Spirit, 2018 - 2018 Mazda 6, 2019 - 2020 Mazda 6, 2016 - 2018 Mazda CX-3, 2022 - 2023 Mazda CX-30, 2017 - 2018 Mazda CX-5, 2019 - 2019 Mazda CX-5, 2020 - 2021 Mazda CX-5, 2022 - 2022 Mazda CX-5, 2023 - 2023 Mazda CX-50, 2016 - 2020 Mazda CX-9, 2016 - 2020 Mazda MX-5 Miata, 1989 - 1995 Plymouth Acclaim, 1983 - 1988 Plymouth Caravelle, 1986 - 1988 Plymouth Caravelle, 1987 - 1989 Plymouth Expo, 1987 - 1988 Plymouth Grand Voyager, 1990 - 1992 Plymouth Grand Voyager, 1981 - 1990 Plymouth Horizon, 1983 - 1986 Plymouth Horizon, 1981 - 1989 Plymouth Reliant, 1986 - 1989 Plymouth Reliant, 1983 - 1983 Plymouth Scamp, 1987 - 1994 Plymouth Sundance, 1988 - 1994 Plymouth Sundance, 1981 - 1982 Plymouth TC3, 1983 - 1983 Plymouth Turismo, 1983 - 1986 Plymouth Turismo, 1983 - 1987 Plymouth Turismo, 1984 - 1986 Plymouth Turismo 2.2, 1984 - 1987 Plymouth Voyager, 1987 - 1995 Plymouth Voyager, 1991 - 1992 Plymouth Voyager, 1979 - 1979 Pontiac Acadian, 1980 - 1980 Pontiac Acadian, 1981 - 1987 Pontiac Acadian, 1981 - 1987 Pontiac T1000
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Vehicle: Pontiac
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DYWH
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A-Premium APTHA0260 Engine Coolant Thermostat Housing Assembly
A-Premium®Part # APTHA0260
A-Premium APTHA0260 Engine Coolant Thermostat Housing Assembly
4.648 Reviews
$88.99
Quantity Less than 5
Edit ZIP code
2-year warranty
90 days free return
Fits 2012 - 2017 Chevrolet Caprice, 2008 - 2009 Pontiac G8
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Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialMetal
ColorNatural
ConditionNew
item #10156DLL
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A-Premium APTHA0286 Engine Coolant Thermostat Housing Assembly
A-Premium®Part # APTHA0286
A-Premium APTHA0286 Engine Coolant Thermostat Housing Assembly
4.648 Reviews
$38.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 2009 - 2011 Chevrolet Aveo, 2009 - 2011 Chevrolet Aveo5, 2011 - 2016 Chevrolet Cruze, 2016 - 2016 Chevrolet Cruze Limited, 2013 - 2017 Chevrolet Sonic, 2012 - 2018 Chevrolet Sonic, 2013 - 2020 Chevrolet Trax, 2009 - 2010 Pontiac G3, 2009 - 2009 Pontiac G3 Wave, 2009 - 2009 Suzuki Swift+
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Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialMetal
ColorNatural
ConditionNew
item #10156DST
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A-Premium APTHE038 Engine Coolant Thermostat
A-Premium®Part # APTHE038
A-Premium APTHE038 Engine Coolant Thermostat
4.648 Reviews
$16.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 2013 - 2021 Blue Bird Vision School Bus, 1981 - 1986 Chevrolet Chevette, 2002 - 2002 Lincoln Blackwood, 2006 - 2008 Lincoln Mark LT, 1998 - 2014 Lincoln Navigator, 2003 - 2011 Lincoln Town Car, 1994 - 1997 Mercury Cougar, 1992 - 2011 Mercury Grand Marquis, 2005 - 2006 Mercury Monterey, 2002 - 2010 Mercury Mountaineer, 1989 - 1989 Peugeot 405, 1990 - 1991 Peugeot 405, 1981 - 1986 Pontiac Acadian
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialMetal
ConditionNew
item #10156CKV
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A-Premium APTHE028 Engine Coolant Thermostat
A-Premium®Part # APTHE028
A-Premium APTHE028 Engine Coolant Thermostat
4.648 Reviews
$17.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 2013 - 2021 Blue Bird Vision School Bus, 1981 - 1986 Chevrolet Chevette, 2002 - 2002 Lincoln Blackwood, 2006 - 2008 Lincoln Mark LT, 1998 - 2014 Lincoln Navigator, 2003 - 2011 Lincoln Town Car, 1994 - 1997 Mercury Cougar, 1992 - 2011 Mercury Grand Marquis, 2005 - 2006 Mercury Monterey, 2002 - 2010 Mercury Mountaineer, 1989 - 1989 Peugeot 405, 1990 - 1991 Peugeot 405, 1981 - 1986 Pontiac Acadian
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialMetal
ConditionNew
item #10156D8W
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A-Premium APTHE004 Engine Coolant Thermostat
A-Premium®Part # APTHE004
A-Premium APTHE004 Engine Coolant Thermostat
4.648 Reviews
$31.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 1980 - 1982 AMC Concord, 1981 - 1983 AMC Eagle, 1977 - 1977 AMC Gremlin, 1980 - 1982 AMC Spirit, 1979 - 1979 AMC Spirit, 2013 - 2021 Blue Bird Vision School Bus, 1981 - 1986 Chevrolet Chevette, 1982 - 1982 Datsun 720, 1978 - 1978 Dodge D100, 1979 - 1979 Dodge D100, 1978 - 1978 Dodge D150, 1979 - 1980 Dodge D150, 1978 - 1978 Dodge D200, 1980 - 1980 Dodge D200, 1983 - 1985 Dodge Power Ram 50, 1983 - 1985 Dodge Ram 50, 1978 - 1978 Dodge W150, 1979 - 1979 Dodge W150, 1978 - 1978 Dodge W200, 1979 - 1979 Dodge W200, 1999 - 1999 INFINITI G20, 1991 - 1996 INFINITI G20, 1981 - 1982 Isuzu I-Mark, 1983 - 1984 Isuzu I-Mark, 1983 - 1987 Isuzu Pickup, 1992 - 1992 Isuzu Stylus, 1984 - 1984 Isuzu Trooper, 1986 - 1987 Isuzu Trooper, 1982 - 1987 Jaguar Vanden Plas, 1978 - 1978 Jaguar XJ6, 1983 - 1987 Jaguar XJ6, 1980 - 1983 Jeep CJ5, 1980 - 1983 Jeep CJ7, 1980 - 1983 Jeep DJ5, 1981 - 1983 Jeep Scrambler, 2002 - 2002 Lincoln Blackwood, 2006 - 2008 Lincoln Mark LT, 1998 - 2014 Lincoln Navigator, 1991 - 2011 Lincoln Town Car, 1979 - 1985 Mazda RX-7, 1987 - 1988 Mazda RX-7, 1994 - 1997 Mercury Cougar, 1992 - 2011 Mercury Grand Marquis, 2005 - 2006 Mercury Monterey, 2002 - 2010 Mercury Mountaineer, 1983 - 1985 Mitsubishi Mighty Max, 1983 - 1983 Nissan 720, 1983 - 1983 Nissan 720, 1984 - 1986 Nissan 720, 1996 - 1998 Nissan 200SX, 1989 - 1998 Nissan 240SX, 1993 - 2001 Nissan Altima, 1991 - 1992 Nissan Axxess, 1990 - 1994 Nissan D21, 2006 - 2008 Nissan Frontier, 1991 - 1993 Nissan NX, 1995 - 1997 Nissan Pickup, 1983 - 1986 Nissan Sentra, 1991 - 1994 Nissan Sentra, 1998 - 2001 Nissan Sentra, 1990 - 1992 Nissan Stanza, 2000 - 2004 Nissan Xterra, 1989 - 1989 Peugeot 405, 1990 - 1991 Peugeot 405, 1971 - 1973 Plymouth Cricket, 1981 - 1986 Pontiac Acadian, 1980 - 1981 Pontiac Firebird, 1978 - 1978 Pontiac Sunbird, 1977 - 1980 Saab 99, 1979 - 1995 Saab 900, 1991 - 1993 Saab 900, 1994 - 1995 Saab 900, 1986 - 1990 Saab 9000, 1990 - 1995 Saab 9000, 1995 - 1995 Toyota Pickup, 1971 - 1973 Triumph Stag, 1975 - 1981 Triumph TR7, 2005 - 2006 Volkswagen Jetta
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Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V2C8
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Thermostat Housing for Chevrolet Silverado 1500 GMC Sierra 1500 Buick Cadillac
A-Premium®Part # APTHA0198
Thermostat Housing for Chevrolet Silverado 1500 GMC Sierra 1500 Buick Cadillac
4.648 Reviews
$22.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2004 - 2007 Buick Rainier, 2004 - 2007 Cadillac CTS, 2002 - 2006 Cadillac Escalade, 2003 - 2006 Cadillac Escalade ESV, 2002 - 2006 Cadillac Escalade EXT, 2002 - 2006 Chevrolet Avalanche 1500, 1998 - 2002 Chevrolet Camaro, 1997 - 2008 Chevrolet Corvette, 2003 - 2006 Chevrolet Express 1500, 2003 - 2006 Chevrolet Express 2500, 2003 - 2006 Chevrolet Express 3500, 1999 - 2006 Chevrolet Silverado 1500, 2007 - 2007 Chevrolet Silverado 1500 Classic, 2001 - 2003 Chevrolet Silverado 1500 HD, 2005 - 2006 Chevrolet Silverado 1500 HD, 2007 - 2007 Chevrolet Silverado 1500 HD Classic, 1999 - 2004 Chevrolet Silverado 2500, 2001 - 2006 Chevrolet Silverado 2500 HD, 2007 - 2007 Chevrolet Silverado 2500 HD Classic, 2001 - 2006 Chevrolet Silverado 3500, 2007 - 2007 Chevrolet Silverado 3500 Classic, 2007 - 2007 Chevrolet Silverado 3500 HD, 2003 - 2006 Chevrolet SSR, 2000 - 2006 Chevrolet Suburban 1500, 2000 - 2006 Chevrolet Suburban 2500, 2000 - 2006 Chevrolet Tahoe, 2006 - 2006 Chevrolet Trailblazer, 2003 - 2006 Chevrolet Trailblazer EXT, 2003 - 2006 Chevrolet W3500 Tiltmaster, 2003 - 2006 Chevrolet W4500 Tiltmaster, 2005 - 2006 GMC Envoy, 2003 - 2006 GMC Envoy XL, 2004 - 2005 GMC Envoy XUV, 2003 - 2006 GMC Savana 1500, 2003 - 2006 GMC Savana 2500, 2003 - 2006 GMC Savana 3500, 1999 - 2006 GMC Sierra 1500, 2007 - 2007 GMC Sierra 1500 Classic, 2001 - 2003 GMC Sierra 1500 HD, 2005 - 2006 GMC Sierra 1500 HD, 2007 - 2007 GMC Sierra 1500 HD Classic, 1999 - 2004 GMC Sierra 2500, 2001 - 2006 GMC Sierra 2500 HD, 2007 - 2007 GMC Sierra 2500 HD Classic, 2001 - 2006 GMC Sierra 3500, 2007 - 2007 GMC Sierra 3500 Classic, 2004 - 2006 GMC W3500 Forward, 2003 - 2006 GMC W4500 Forward, 2000 - 2006 GMC Yukon, 2000 - 2006 GMC Yukon XL 1500, 2000 - 2006 GMC Yukon XL 2500, 2003 - 2006 Hummer H2, 2003 - 2006 Isuzu Ascender, 2003 - 2006 Isuzu NPR, 2003 - 2006 Isuzu NPR-HD, 2008 - 2009 Pontiac G8, 2004 - 2006 Pontiac GTO, 2005 - 2006 Saab 9-7x, 2004 - 2005 Workhorse FasTrack FT1061, 2005 - 2005 Workhorse FasTrack FT1261, 2004 - 2005 Workhorse FasTrack FT1461, 2004 - 2005 Workhorse FasTrack FT1601, 2004 - 2005 Workhorse FasTrack FT1801, 2006 - 2011 Workhorse W42, 2007 - 2011 Workhorse W62, 2006 - 2012 Workhorse Custom Chassis W42, 2011 - 2012 Workhorse Custom Chassis W62
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Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialAluminum
ColorNatural
ConditionNew
item #1015204K
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Engine Coolant Thermostat for Toyota Camry RAV4 Ford Mitsubishi Scion Lexus 89℃
A-Premium®Part # APTHE071
Engine Coolant Thermostat for Toyota Camry RAV4 Ford Mitsubishi Scion Lexus 89℃
4.648 Reviews
$26.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 1998 - 2002 Chevrolet Prizm, 1992 - 1992 Dodge Colt, 1992 - 1992 Dodge Colt, 1993 - 1996 Eagle Summit, 1995 - 1998 Eagle Talon, 1996 - 1999 Ford Taurus, 1990 - 1991 Lexus ES250, 1992 - 2003 Lexus ES300, 2004 - 2006 Lexus ES330, 2007 - 2017 Lexus ES350, 2010 - 2012 Lexus HS250h, 1990 - 1997 Lexus LS400, 1999 - 2003 Lexus RX300, 2004 - 2006 Lexus RX330, 2007 - 2015 Lexus RX350, 2006 - 2008 Lexus RX400h, 2010 - 2015 Lexus RX450h, 1992 - 1997 Lexus SC400, 1995 - 1996 Mitsubishi Eclipse, 1999 - 1999 Mitsubishi Eclipse, 1996 - 1998 Mitsubishi Eclipse, 2006 - 2011 Mitsubishi Eclipse, 1993 - 1995 Mitsubishi Expo, 1993 - 1994 Mitsubishi Expo LRV, 1993 - 1993 Mitsubishi Galant, 1994 - 1998 Mitsubishi Galant, 2004 - 2011 Mitsubishi Galant, 2004 - 2005 Mitsubishi Lancer, 1994 - 1994 Mitsubishi Mighty Max, 2004 - 2006 Mitsubishi Outlander, 2003 - 2010 Pontiac Vibe, 2009 - 2010 Pontiac Vibe, 2005 - 2010 Scion tC, 2011 - 2016 Scion tC, 2008 - 2015 Scion xB, 2008 - 2014 Scion xD, 1996 - 2002 Toyota 4Runner, 1995 - 2004 Toyota Avalon, 2005 - 2017 Toyota Avalon, 2002 - 2011 Toyota Camry, 2010 - 2011 Toyota Camry, 2012 - 2017 Toyota Camry, 1988 - 1991 Toyota Camry, 1992 - 2006 Toyota Camry, 2004 - 2006 Toyota Camry, 2007 - 2017 Toyota Camry, 2000 - 2005 Toyota Celica, 1990 - 1993 Toyota Celica, 1990 - 1991 Toyota Celica, 2000 - 2013 Toyota Corolla, 2009 - 2012 Toyota Corolla, 2001 - 2007 Toyota Highlander, 2017 - 2017 Toyota Highlander, 2009 - 2016 Toyota Highlander, 2001 - 2003 Toyota Highlander, 2004 - 2010 Toyota Highlander, 2008 - 2016 Toyota Highlander, 2003 - 2014 Toyota Matrix, 2009 - 2013 Toyota Matrix, 1991 - 1995 Toyota MR2, 1991 - 1995 Toyota MR2, 2000 - 2005 Toyota MR2 Spyder, 2001 - 2003 Toyota RAV4, 2004 - 2008 Toyota RAV4, 2009 - 2015 Toyota RAV4, 2016 - 2017 Toyota RAV4, 2006 - 2012 Toyota RAV4, 2012 - 2012 Toyota RAV4, 2011 - 2013 Toyota Sienna, 1998 - 2003 Toyota Sienna, 2004 - 2006 Toyota Sienna, 2007 - 2016 Toyota Sienna, 2002 - 2008 Toyota Solara, 1999 - 2003 Toyota Solara, 2004 - 2008 Toyota Solara, 1995 - 1998 Toyota T100, 1995 - 2004 Toyota Tacoma, 2000 - 2004 Toyota Tundra, 2009 - 2016 Toyota Venza, 2009 - 2016 Toyota Venza
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Pontiac
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DUS4
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A-Premium APTHE029 Engine Coolant Thermostat
A-Premium®Part # APTHE029
A-Premium APTHE029 Engine Coolant Thermostat
4.648 Reviews
$24.99
Only 1 item left in stock
Edit ZIP code
2-year warranty
90 days free return
Fits 2013 - 2021 Blue Bird Vision School Bus, 1981 - 1986 Chevrolet Chevette, 2002 - 2002 Lincoln Blackwood, 2006 - 2008 Lincoln Mark LT, 1998 - 2014 Lincoln Navigator, 2003 - 2011 Lincoln Town Car, 1994 - 1997 Mercury Cougar, 1992 - 2011 Mercury Grand Marquis, 2005 - 2006 Mercury Monterey, 2002 - 2010 Mercury Mountaineer, 1989 - 1989 Peugeot 405, 1990 - 1991 Peugeot 405, 1981 - 1986 Pontiac Acadian
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialMetal
ConditionNew
item #10156AP5
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Thermostat Housing Assembly for Chevrolet Silverado 1500 1999-2003 GMC Cadillac
A-Premium®Part # APTHA0129
Thermostat Housing Assembly for Chevrolet Silverado 1500 1999-2003 GMC Cadillac
4.648 Reviews
$23.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2002 - 2003 Cadillac Escalade, 2002 - 2003 Cadillac Escalade, 2003 - 2003 Cadillac Escalade ESV, 2002 - 2003 Cadillac Escalade EXT, 2002 - 2003 Chevrolet Avalanche 1500, 1998 - 2002 Chevrolet Camaro, 1997 - 2003 Chevrolet Corvette, 2003 - 2003 Chevrolet Express 1500, 2003 - 2003 Chevrolet Express 2500, 2003 - 2003 Chevrolet Express 2500, 2003 - 2003 Chevrolet Express 2500, 2003 - 2003 Chevrolet Express 3500, 2003 - 2003 Chevrolet Express 3500, 2003 - 2003 Chevrolet Express 3500, 1999 - 2003 Chevrolet Silverado 1500, 1999 - 2003 Chevrolet Silverado 1500, 2003 - 2003 Chevrolet Silverado 1500, 2001 - 2003 Chevrolet Silverado 1500 HD, 1999 - 2002 Chevrolet Silverado 2500, 1999 - 2003 Chevrolet Silverado 2500, 2001 - 2003 Chevrolet Silverado 2500 HD, 2001 - 2003 Chevrolet Silverado 3500, 2003 - 2003 Chevrolet SSR, 2000 - 2003 Chevrolet Suburban 1500, 2000 - 2003 Chevrolet Suburban 2500, 2000 - 2003 Chevrolet Tahoe, 2000 - 2003 Chevrolet Tahoe, 2003 - 2003 Chevrolet Trailblazer EXT, 2003 - 2003 Chevrolet W3500 Tiltmaster, 2003 - 2003 Chevrolet W4500 Tiltmaster, 2003 - 2003 GMC Envoy XL, 2003 - 2003 GMC Savana 1500, 2003 - 2003 GMC Savana 2500, 2003 - 2003 GMC Savana 2500, 2003 - 2003 GMC Savana 2500, 2003 - 2003 GMC Savana 3500, 2003 - 2003 GMC Savana 3500, 1999 - 2003 GMC Sierra 1500, 1999 - 2003 GMC Sierra 1500, 2001 - 2003 GMC Sierra 1500, 2001 - 2003 GMC Sierra 1500 HD, 1999 - 2000 GMC Sierra 2500, 1999 - 2003 GMC Sierra 2500, 2001 - 2003 GMC Sierra 2500 HD, 2001 - 2003 GMC Sierra 3500, 2003 - 2003 GMC W4500 Forward, 2000 - 2003 GMC Yukon, 2000 - 2003 GMC Yukon, 2001 - 2003 GMC Yukon, 2000 - 2003 GMC Yukon XL 1500, 2001 - 2003 GMC Yukon XL 1500, 2000 - 2003 GMC Yukon XL 2500, 2003 - 2003 Hummer H2, 2003 - 2003 Isuzu NPR, 2003 - 2003 Isuzu NPR-HD, 1998 - 2002 Pontiac Firebird
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialAluminum
Part interchange
902-2701, 379160, 85254, 12571261, 8125712610
item #10027QWE
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Engine Coolant Thermostat Housing Assembly for Chevrolet Malibu Buick Olds Pontiac
A-Premium®Part # APTHA0147
Engine Coolant Thermostat Housing Assembly for Chevrolet Malibu Buick Olds Pontiac
4.648 Reviews
$16.99
Quantity Less than 4
Edit ZIP code
2-year warranty
90 days free return
Fits 1996 - 1998 Buick Skylark, 1996 - 2002 Chevrolet Cavalier, 1997 - 1999 Chevrolet Malibu, 1996 - 1998 Oldsmobile Achieva, 1999 - 2001 Oldsmobile Alero, 1996 - 2001 Pontiac Grand Am, 1996 - 2002 Pontiac Sunfire
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialPlastic
Part interchange
902-105, CH5164, 85164, 24575259
item #1000W521
Note
Thermostat Housing Assembly -- Engine Coolant Water Outlet.
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A-Premium APTHE006 Engine Coolant Thermostat
A-Premium®Part # APTHE006
A-Premium APTHE006 Engine Coolant Thermostat
4.648 Reviews
$19.99
Quantity Less than 2
Edit ZIP code
2-year warranty
90 days free return
Fits 1998 - 2002 Chevrolet Prizm, 1992 - 1992 Dodge Colt, 1993 - 1996 Eagle Summit, 1995 - 1998 Eagle Talon, 1996 - 1999 Ford Taurus, 1990 - 1991 Lexus ES250, 1992 - 2003 Lexus ES300, 2004 - 2006 Lexus ES330, 2007 - 2018 Lexus ES350, 2010 - 2012 Lexus HS250h, 1990 - 1997 Lexus LS400, 1999 - 2003 Lexus RX300, 2004 - 2006 Lexus RX330, 2007 - 2015 Lexus RX350, 2006 - 2008 Lexus RX400h, 2010 - 2015 Lexus RX450h, 1992 - 1997 Lexus SC400, 1995 - 1996 Mitsubishi Eclipse, 1996 - 1998 Mitsubishi Eclipse, 1999 - 1999 Mitsubishi Eclipse, 2006 - 2011 Mitsubishi Eclipse, 1993 - 1995 Mitsubishi Expo, 1993 - 1994 Mitsubishi Expo LRV, 1993 - 1993 Mitsubishi Galant, 1994 - 1998 Mitsubishi Galant, 2004 - 2011 Mitsubishi Galant, 2004 - 2005 Mitsubishi Lancer, 1994 - 1994 Mitsubishi Mighty Max, 2004 - 2006 Mitsubishi Outlander, 2003 - 2010 Pontiac Vibe, 2009 - 2010 Pontiac Vibe, 2005 - 2010 Scion tC, 2011 - 2016 Scion tC, 2008 - 2015 Scion xB, 2008 - 2013 Scion xD, 1996 - 2002 Toyota 4Runner, 1995 - 2004 Toyota Avalon, 2005 - 2018 Toyota Avalon, 2002 - 2011 Toyota Camry, 2010 - 2011 Toyota Camry, 2012 - 2017 Toyota Camry, 1988 - 1991 Toyota Camry, 1992 - 2006 Toyota Camry, 2004 - 2006 Toyota Camry, 2007 - 2017 Toyota Camry, 2000 - 2005 Toyota Celica, 1990 - 1993 Toyota Celica, 1990 - 1991 Toyota Celica, 1998 - 1999 Toyota Corolla, 2000 - 2013 Toyota Corolla, 2014 - 2016 Toyota Corolla, 2014 - 2017 Toyota Corolla, 2014 - 2018 Toyota Corolla, 2014 - 2019 Toyota Corolla, 2016 - 2016 Toyota Corolla, 2017 - 2017 Toyota Corolla, 2017 - 2018 Toyota Corolla, 2017 - 2019 Toyota Corolla, 2009 - 2012 Toyota Corolla, 2001 - 2007 Toyota Highlander, 2009 - 2014 Toyota Highlander, 2016 - 2016 Toyota Highlander, 2017 - 2017 Toyota Highlander, 2018 - 2019 Toyota Highlander, 2001 - 2003 Toyota Highlander, 2004 - 2010 Toyota Highlander, 2008 - 2016 Toyota Highlander, 2003 - 2014 Toyota Matrix, 2009 - 2013 Toyota Matrix, 1991 - 1995 Toyota MR2, 2000 - 2005 Toyota MR2 Spyder, 2012 - 2012 Toyota RAV4, 2001 - 2003 Toyota RAV4, 2004 - 2008 Toyota RAV4, 2009 - 2018 Toyota RAV4, 2006 - 2012 Toyota RAV4, 2011 - 2012 Toyota Sienna, 1998 - 2003 Toyota Sienna, 2004 - 2006 Toyota Sienna, 2007 - 2016 Toyota Sienna, 2020 - 2020 Toyota Sienna, 2002 - 2008 Toyota Solara, 1999 - 2003 Toyota Solara, 1995 - 1998 Toyota T100, 1995 - 2004 Toyota Tacoma, 2000 - 2004 Toyota Tundra, 2009 - 2016 Toyota Venza
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialMetal
ConditionNew
item #10156A30
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Vemo V51-99-0005 Engine Coolant Thermostat
VemoPart # V51-99-0005
Vemo V51-99-0005 Engine Coolant Thermostat
53 Reviews
$109.99
Quantity Less than 5
Edit ZIP code
3-year warranty
90 days free return
Fits 2009-2011 Chevrolet Aveo, 2009-2011 Chevrolet Aveo5, 2011-2015 Chevrolet Cruze, 2012-2015 Chevrolet Sonic, 2009-2009 Pontiac G3, 2009-2009 Pontiac G3 Wave, 2010-2010 Pontiac G3
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Vehicle: Pontiac
Item LocatedUnited States
Quantity1
Part interchange
V51-99-0005, 3100077, 55578419, 96984104, 902821, 34710, 55564891, 55587349, 
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item #1001QLZZ
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ÜRO Parts CE0712936 Engine Coolant Thermostat Housing Assembly
ÜRO PartsPart # CE0712936
ÜRO Parts CE0712936 Engine Coolant Thermostat Housing Assembly
4.410 Reviews
$62.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2009-2011 Chevrolet Aveo, 2009-2011 Chevrolet Aveo5, 2010-2010 Chevrolet Cruze, 2011-2016 Chevrolet Cruze, 2012-2018 Chevrolet Sonic, 2013-2018 Chevrolet Trax, 2016-2017 Chevrolet Sonic, 2009-2009 Pontiac G3, 2009-2009 Pontiac G3 Wave, 2010-2010 Pontiac G3, 2009-2009 Suzuki Swift+
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Pontiac
Item LocatedUnited States
Quantity1
ColorSilver
Part interchange
CE0712936, 55564891, 55578419, 55587349, 55597008, 96980318, 96984104, 902-821, 
...View more
item #1000ZSX8
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Engine Coolant Thermostat for GMC S15 Isuzu Oldsmobile Pontiac Subaru Suzuki 91℃
A-Premium®Part # APTHE078
Engine Coolant Thermostat for GMC S15 Isuzu Oldsmobile Pontiac Subaru Suzuki 91℃
4.648 Reviews
$20.99
Only 1 item left in stock
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Fits 1991 - 1995 GMC C2500, 1992 - 1995 GMC C2500 Suburban, 1991 - 1995 GMC C3500, 1991 - 1995 GMC C3500HD, 1991 - 1991 GMC G3500, 1992 - 1992 GMC G3500, 1993 - 1996 GMC G3500, 1995 - 1995 GMC Jimmy, 1992 - 1994 GMC Jimmy, 1991 - 1995 GMC K2500, 1992 - 1995 GMC K2500 Suburban, 1991 - 1995 GMC K3500, 1991 - 1995 GMC P3500, 1996 - 1997 GMC P3500, 1991 - 1991 GMC R2500 Suburban, 1991 - 1991 GMC R3500, 1988 - 1988 GMC S15, 1990 - 1990 GMC S15, 1995 - 1995 GMC Safari, 1992 - 1994 GMC Safari, 1994 - 1995 GMC Sonoma, 1996 - 2003 GMC Sonoma, 1991 - 1991 GMC Sonoma, 1992 - 1993 GMC Sonoma, 1992 - 1995 GMC Sonoma, 1991 - 1991 GMC V3500, 1996 - 2000 Isuzu Hombre, 1991 - 1994 Isuzu Pickup, 1991 - 1992 Isuzu Rodeo, 1990 - 1991 Isuzu Trooper, 1992 - 1994 Oldsmobile 88, 1986 - 1994 Oldsmobile 98, 1992 - 1993 Oldsmobile Achieva, 1992 - 1992 Oldsmobile Bravada, 1993 - 1994 Oldsmobile Bravada, 1985 - 1987 Oldsmobile Calais, 1988 - 1988 Oldsmobile Cutlass, 1989 - 1991 Oldsmobile Cutlass, 1993 - 1996 Oldsmobile Cutlass, 1989 - 1993 Oldsmobile Cutlass, 1986 - 1986 Oldsmobile Cutlass, 1987 - 1988 Oldsmobile Cutlass, 1991 - 1992 Oldsmobile Cutlass, 1996 - 1996 Oldsmobile Cutlass, 1986 - 1986 Oldsmobile Delta, 1986 - 1991 Oldsmobile Delta, 1992 - 1995 Oldsmobile Silhouette, 1986 - 1992 Oldsmobile Toronado, 1987 - 1994 Pontiac Bonneville, 1989 - 1989 Pontiac Firebird, 1990 - 1992 Pontiac Firebird, 1993 - 1995 Pontiac Firebird, 1989 - 1989 Pontiac Firebird, 1995 - 1997 Pontiac Firebird, 1985 - 1991 Pontiac Firefly, 1995 - 2000 Pontiac Firefly, 1995 - 2000 Pontiac Firefly, 1985 - 1987 Pontiac Grand, 1992 - 1993 Pontiac Grand, 1996 - 1996 Pontiac Grand, 1995 - 1995 Pontiac Sunfire, 1992 - 1995 Pontiac Trans Sport, 1987 - 1989 Subaru Justy, 1990 - 1991 Subaru Justy, 1995 - 2000 Suzuki Esteem, 1994 - 1994 Suzuki Swift, 1991 - 2001 Suzuki Swift
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item #1013DTRR
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Thermostat Housing Assembly for Chevrolet Aveo 2004-2011 Aveo5 Pontiac G3 Wave
A-Premium®Part # APTHA0056
Thermostat Housing Assembly for Chevrolet Aveo 2004-2011 Aveo5 Pontiac G3 Wave
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Fits 2004 - 2008 Chevrolet Aveo, 2009 - 2011 Chevrolet Aveo, 2006 - 2008 Chevrolet Aveo5, 1999 - 2002 Daewoo Lanos, 2009 - 2010 Pontiac G3, 2005 - 2008 Pontiac Wave, 2005 - 2007 Pontiac Wave5, 2007 - 2008 Suzuki Swift+
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Vehicle: Pontiac
Item LocatedUnited States
Quantity1
MaterialAluminum
ColorSilver
Part interchange
96282726, 96407677
item #1003D0VP
Note
This part comes with a cover and thermostat.
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Engine Coolant Thermostat Housing Assembly for Chevrolet 99-03 GMC Sierra 1500
A-Premium®Part # APTHA0109
Engine Coolant Thermostat Housing Assembly for Chevrolet 99-03 GMC Sierra 1500
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Fits 2002 - 2003 Cadillac Escalade, 2002 - 2003 Cadillac Escalade, 2003 - 2003 Cadillac Escalade ESV, 2002 - 2003 Cadillac Escalade EXT, 2002 - 2003 Chevrolet Avalanche 1500, 1998 - 2002 Chevrolet Camaro, 1997 - 2003 Chevrolet Corvette, 2003 - 2003 Chevrolet Express 1500, 2003 - 2003 Chevrolet Express 2500, 2003 - 2003 Chevrolet Express 2500, 2003 - 2003 Chevrolet Express 2500, 2003 - 2003 Chevrolet Express 3500, 2003 - 2003 Chevrolet Express 3500, 2003 - 2003 Chevrolet Express 3500, 1999 - 2003 Chevrolet Silverado 1500, 1999 - 2003 Chevrolet Silverado 1500, 2003 - 2003 Chevrolet Silverado 1500, 2001 - 2003 Chevrolet Silverado 1500 HD, 1999 - 2002 Chevrolet Silverado 2500, 1999 - 2003 Chevrolet Silverado 2500, 2001 - 2003 Chevrolet Silverado 2500 HD, 2001 - 2003 Chevrolet Silverado 3500, 2003 - 2003 Chevrolet Sonora, 2003 - 2003 Chevrolet SSR, 2000 - 2003 Chevrolet Suburban 1500, 2000 - 2003 Chevrolet Suburban 2500, 2000 - 2003 Chevrolet Tahoe, 2000 - 2003 Chevrolet Tahoe, 2003 - 2003 Chevrolet Trailblazer EXT, 2003 - 2003 Chevrolet W3500 Tiltmaster, 2003 - 2003 Chevrolet W4500 Tiltmaster, 2003 - 2003 GMC Envoy XL, 2003 - 2003 GMC Savana 1500, 2003 - 2003 GMC Savana 2500, 2003 - 2003 GMC Savana 2500, 2003 - 2003 GMC Savana 2500, 2003 - 2003 GMC Savana 3500, 2003 - 2003 GMC Savana 3500, 1999 - 2003 GMC Sierra 1500, 1999 - 2003 GMC Sierra 1500, 2002 - 2003 GMC Sierra 1500, 2001 - 2003 GMC Sierra 1500 HD, 1999 - 2000 GMC Sierra 2500, 1999 - 2003 GMC Sierra 2500, 2001 - 2003 GMC Sierra 2500 HD, 2001 - 2003 GMC Sierra 3500, 2003 - 2003 GMC W4500 Forward, 2000 - 2003 GMC Yukon, 2000 - 2003 GMC Yukon, 2001 - 2003 GMC Yukon, 2000 - 2003 GMC Yukon XL 1500, 2001 - 2003 GMC Yukon XL 1500, 2000 - 2003 GMC Yukon XL 2500, 2003 - 2003 Hummer H2, 2003 - 2003 Isuzu NPR, 2003 - 2003 Isuzu NPR-HD, 1998 - 2002 Pontiac Firebird
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902-700, 379187, 85580, 12562740, 12571261, 18125712610
item #1005DY14
Note
Engine Coolant Thermostat Housing Assembly -- With Water Pump Casting No. 12562459, Includes 186 Fahrenheit Degree Thermostat.
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Engine Coolant Thermostat for Lincoln Navigato Town Car Chevrolet Chevette 91℃
A-Premium®Part # APTHE040
Engine Coolant Thermostat for Lincoln Navigato Town Car Chevrolet Chevette 91℃
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Fits 2013 - 2021 Blue Bird Vision School Bus, 1981 - 1986 Chevrolet Chevette, 2002 - 2002 Lincoln Blackwood, 2006 - 2008 Lincoln Mark LT, 1998 - 2014 Lincoln Navigator, 2003 - 2011 Lincoln Town Car, 1994 - 1997 Mercury Cougar, 1992 - 2011 Mercury Grand Marquis, 2005 - 2006 Mercury Monterey, 2002 - 2010 Mercury Mountaineer, 1989 - 1989 Peugeot 405, 1990 - 1991 Peugeot 405, 1981 - 1986 Pontiac Acadian
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12
Page 1 of 2

What is an engine thermostat?

 While all engines can become too hot, if your thermostat isn't working correctly, your engine's well-being is at serious risk. The engine thermostat, often simply referred to as a thermostat, regulates the engine's operating temperature within an optimal range (typically around 195 to 220 degrees Fahrenheit).

How does a car thermostat work?

As a temperature-sensitive valve within the cooling system, a car thermostat responds to changes in coolant temperature. Understanding how it works by the following breakdown steps:

  • Closed position (cold start)

Initially closed to help the engine warm up quickly.

  • Heating up

The engine generates heat during operation.

  • Opening the thermostat

A temperature-sensitive element (usually wax) causes the thermostat to open gradually.

  • Coolant flow

When open, coolant flows from the engine to the radiator.

  • Maintaining optimal temperature

Adjusts coolant flow to maintain the ideal engine temperature.

  • Temperature regulation

Continuously adjusts to prevent overheating and ensure efficient operation.

Signs of a bad thermostat

  1. Overheating: The engine becomes excessively hot due to a stuck-closed thermostat.
  2. Low or fluctuating temperature: A thermostat stuck open results in a cooler engine, affecting fuel efficiency and heating.
  3. Temperature warning light: Illuminates to indicate engine overheating due to a faulty thermostat.
  4. Poor fuel efficiency: Stuck-open thermostat reduces fuel efficiency as the engine operates less efficiently at lower temperatures.
  5. Inadequate cabin heating: Insufficient cabin heating in cold weather with a thermostat that's stuck open.
  6. Coolant leaks: Gasket or sealing issues can lead to coolant leaks.
  7. Rapid temperature fluctuations: The gauge shows rapid swings between hot and cold.
  8. Engine running hot at idle: Higher engine temperature during idle or in traffic due to restricted coolant flow.
  9. Slow or inconsistent warm-up: Longer-than-normal warm-up times, even in moderate weather.
  10. Inconsistent heater operation: This affects the performance of the vehicle's heater, causing inconsistent or inadequate heating in cold weather.

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