Beat the Heat – Summer Essential Maintenance
24/7 Customer service
USD
Add your vehicle
Address
Login
Cart
Item
$0.00
Add your vehicle to ensure fitment/Choose a yearRequired Fields
Select a different vehicle
Make/Model
VIN
Save

Isuzu Thermostat

36 items

Upgrade your vehicle's thermostat with A-Premium's high-quality options. Choose reliability and durability for a smoother ride.

  • All filters
  • Sort By
  • Year
  • Model
  • Price
  • Placement on Vehicle
  • Brand
  • Material
  • Color
  • Warranty
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
4.687 Reviews
$22.99
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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
MaterialAluminum
ConditionNew
item #10027T01
Show less
Thermostat Housing Assembly for Chevrolet Silverado 1500 GMC Canyon Sierra 1500
A-Premium®Part # APTHA0203
Thermostat Housing Assembly for Chevrolet Silverado 1500 GMC Canyon Sierra 1500
4.687 Reviews
$20.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2007 - 2007 Buick Rainier, 2009 - 2013 Cadillac Escalade, 2007 - 2014 Cadillac Escalade, 2021 - 2022 Cadillac Escalade, 2007 - 2014 Cadillac Escalade ESV, 2021 - 2022 Cadillac Escalade ESV, 2007 - 2013 Cadillac Escalade EXT, 2007 - 2013 Chevrolet Avalanche, 2007 - 2009 Chevrolet Avalanche, 2009 - 2012 Chevrolet Colorado, 2020 - 2022 Chevrolet Corvette, 2007 - 2014 Chevrolet Express 1500, 2018 - 2022 Chevrolet Express 2500, 2007 - 2017 Chevrolet Express 2500, 2007 - 2020 Chevrolet Express 2500, 2021 - 2022 Chevrolet Express 2500, 2018 - 2022 Chevrolet Express 3500, 2007 - 2017 Chevrolet Express 3500, 2007 - 2008 Chevrolet Express 3500, 2007 - 2020 Chevrolet Express 3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
Installation PositionWater Pump
ConditionNew
item #1000W523
Show less
A-Premium APTHE004 Engine Coolant Thermostat
A-Premium®Part # APTHE004
A-Premium APTHE004 Engine Coolant Thermostat
4.687 Reviews
$31.99
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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V2C8
Show less
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
4.687 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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
ColorNatural
ConditionNew
item #1015204K
Show less
A-Premium APTHE030 Engine Coolant Thermostat
A-Premium®Part # APTHE030
A-Premium APTHE030 Engine Coolant Thermostat
4.687 Reviews
$19.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2007 - 2007 Buick Rainier, 2019 - 2020 Cadillac CT6, 2009 - 2014 Cadillac CTS, 2009 - 2013 Cadillac Escalade, 2007 - 2014 Cadillac Escalade, 2021 - 2023 Cadillac Escalade, 2023 - 2023 Cadillac Escalade ESV, 2007 - 2009 Cadillac Escalade ESV, 2011 - 2014 Cadillac Escalade ESV, 2021 - 2023 Cadillac Escalade ESV, 2007 - 2008 Cadillac Escalade EXT, 2009 - 2013 Cadillac Escalade EXT, 2007 - 2007 GMC C8500 Topkick, 2009 - 2012 GMC Canyon, 2007 - 2009 GMC Envoy, 2007 - 2014 GMC Savana 1500, 2007 - 2017 GMC Savana 2500, 2008 - 2020 GMC Savana 2500, 2007 - 2010 GMC Savana 3500, 2012 - 2017 GMC Savana 3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V1U2
Show less
A-Premium APTHE032 Engine Coolant Thermostat
A-Premium®Part # APTHE032
A-Premium APTHE032 Engine Coolant Thermostat
4.687 Reviews
$22.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2007 - 2007 Buick Rainier, 2009 - 2014 Cadillac CTS, 2007 - 2014 Cadillac Escalade, 2009 - 2013 Cadillac Escalade, 2021 - 2023 Cadillac Escalade, 2007 - 2014 Cadillac Escalade ESV, 2021 - 2023 Cadillac Escalade ESV, 2007 - 2013 Cadillac Escalade EXT, 2007 - 2007 GMC C8500 Topkick, 2009 - 2012 GMC Canyon, 2007 - 2009 GMC Envoy, 2007 - 2014 GMC Savana 1500, 2007 - 2017 GMC Savana 2500, 2007 - 2020 GMC Savana 2500, 2018 - 2021 GMC Savana 2500, 2021 - 2022 GMC Savana 2500, 2007 - 2017 GMC Savana 3500, 2007 - 2020 GMC Savana 3500, 2018 - 2021 GMC Savana 3500, 2021 - 2022 GMC Savana 3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V0PY
Show less
A-Premium APTHE005 Engine Coolant Thermostat
A-Premium®Part # APTHE005
A-Premium APTHE005 Engine Coolant Thermostat
4.687 Reviews
$20.99
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, 1982 - 1982 Isuzu I-Mark, 1984 - 1984 Isuzu I-Mark, 1985 - 1987 Jaguar Vanden Plas, 1978 - 1978 Jaguar XJ6, 1983 - 1987 Jaguar XJ6, 1971 - 1974 Jaguar XKE, 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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V0CQ
Show less
Engine Coolant Thermostat Housing Assembly for Chevy Silverado Suburban 1500 GMC
A-Premium®Part # APTHA0148
Engine Coolant Thermostat Housing Assembly for Chevy Silverado Suburban 1500 GMC
4.687 Reviews
$19.99
Edit ZIP code
2-year warranty
90 days free return
Fits 1992 - 1995 Chevrolet G10, 1992 - 1995 Chevrolet G20, 1988 - 1995 GMC K3500, 1988 - 1995 Chevrolet K1500, 1988 - 1995 GMC C1500, 1988 - 1995 Chevrolet C1500, 1990 - 1992 Cadillac Brougham, 1993 - 1996 Isuzu NPR, 1992 - 1995 GMC G2500, 1992 - 1995 GMC K1500 Suburban, 1992 - 1996 Chevrolet G30, 1992 - 1995 GMC G2500, 1989 - 1994 Chevrolet Blazer, 1992 - 1993 Chevrolet G10, 1988 - 1995 GMC K2500, 1993 - 1995 Chevrolet W4500 Tiltmaster, 1996 - 1996 Chevrolet W3500 Tiltmaster, 1988 - 1995 Chevrolet C2500, 1988 - 1995 GMC K2500, 1988 - 1995 Chevrolet C3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
ConditionNew
item #10013XDX
Note
This item comes with Cover.
Show less
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
4.687 Reviews
$23.99
Low stock: Only 4 left
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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
MaterialAluminum
ConditionNew
item #10027QWE
Show less
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℃
4.687 Reviews
$20.99
Low stock: Only 5 left
Edit ZIP code
2-year warranty
90 days free return
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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DTRR
Note
Start to Open Temperature: 91℃.
Show less
Engine Coolant Thermostat for Jeep Chevrolet Ford GMC Buick Cadillac Pontiac 88℃
A-Premium®Part # APTHE090
Engine Coolant Thermostat for Jeep Chevrolet Ford GMC Buick Cadillac Pontiac 88℃
4.687 Reviews
$13.99
Low stock: Only 3 left
Edit ZIP code
2-year warranty
90 days free return
Fits 1989 - 1990 Chrysler TC Maserati, 1982 - 1987 GMC S15, 1987 - 1987 Buick Skyhawk, 1981 - 1981 Chevrolet Chevette, 1989 - 1989 Isuzu Trooper, 1983 - 1989 GMC S15 Jimmy, 1988 - 1991 Pontiac Optima, 1970 - 1974 Saab Sonett, 1982 - 1988 Chevrolet Camaro, 1984 - 1986 Jeep Wagoneer, 1981 - 1982 Ford Courier, 1976 - 1977 Mercury Capri, 1966 - 1972 Opel Kadett, 1983 - 1986 Cadillac Cimarron, 1984 - 1985 Pontiac J2000 Sunbird, 1984 - 1986 Jeep Cherokee, 1983 - 1984 GMC S15, 1983 - 1986 Oldsmobile Firenza, 1971 - 1974 Mercury Capri, 1982 - 1982 Chevrolet Cavalier
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
ConditionNew
item #101881TK
Note
Start to Open Temperature: 88℃.
Show less
Engine Coolant Thermostat for Chevrolet Silverado 1500 Tahoe Express 2500 K3500
A-Premium®Part # APTHE087
Engine Coolant Thermostat for Chevrolet Silverado 1500 Tahoe Express 2500 K3500
4.687 Reviews
$14.99
Edit ZIP code
2-year warranty
90 days free return
Fits 1996 - 2003 Chevrolet W4500 Tiltmaster, 1996 - 1996 Chevrolet C2500, 1996 - 2000 Chevrolet C2500, 1996 - 1996 Chevrolet P30, 1996 - 1999 Chevrolet K1500, 1996 - 1998 Chevrolet C1500, 1996 - 2005 Chevrolet Blazer, 1996 - 2002 Chevrolet Express 2500, 2002 - 2002 Chevrolet Express 2500, 1996 - 2002 Chevrolet Express 1500, 1996 - 1999 Chevrolet C1500, 1996 - 2003 Chevrolet W3500 Tiltmaster, 1997 - 1999 Chevrolet P30, 1997 - 1998 Chevrolet Express 3500, 1996 - 1999 Chevrolet C2500 Suburban, 1996 - 1999 Chevrolet C2500, 1997 - 1999 Chevrolet C3500, 2002 - 2002 Chevrolet Blazer, 2000 - 2000 Chevrolet C3500HD, 1996 - 1998 Chevrolet K1500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
ConditionNew
item #101779YZ
Note
【Note-1】 Start to Open Temperature: 92℃.
【Note-2】 For Chevrolet P30 1996 V8 5.7L, This item fits the model with VIN R.
Show less
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
4.687 Reviews
$18.99
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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
ColorNatural
ConditionNew
item #1005DY14
Note
Engine Coolant Thermostat Housing Assembly -- With Water Pump Casting No. 12562459, Includes 186 Fahrenheit Degree Thermostat.
Show less
A-Premium APTHE003 Engine Coolant Thermostat
A-Premium®Part # APTHE003
A-Premium APTHE003 Engine Coolant Thermostat
4.687 Reviews
$20.99
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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V2KW
Show less
Engine Coolant Thermostat for Jeep Cherokee 84-86 Chevy Camaro 82-88 Buick 92℃
A-Premium®Part # APTHE091
Engine Coolant Thermostat for Jeep Cherokee 84-86 Chevy Camaro 82-88 Buick 92℃
4.687 Reviews
$16.99
Low stock: Only 1 left
Edit ZIP code
2-year warranty
90 days free return
Fits 1989 - 1990 Chrysler TC Maserati, 1982 - 1987 GMC S15, 1987 - 1987 Buick Skyhawk, 1981 - 1981 Chevrolet Chevette, 1989 - 1989 Isuzu Trooper, 1983 - 1989 GMC S15 Jimmy, 1988 - 1991 Pontiac Optima, 1970 - 1974 Saab Sonett, 1982 - 1988 Chevrolet Camaro, 1984 - 1986 Jeep Wagoneer, 1981 - 1982 Ford Courier, 1976 - 1977 Mercury Capri, 1966 - 1972 Opel Kadett, 1983 - 1986 Cadillac Cimarron, 1984 - 1985 Pontiac J2000 Sunbird, 1984 - 1986 Jeep Cherokee, 1983 - 1984 GMC S15, 1983 - 1986 Oldsmobile Firenza, 1971 - 1974 Mercury Capri, 1982 - 1982 Chevrolet Cavalier
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
ConditionNew
item #1018827P
Note
Start to Open Temperature: 92℃.
Show less
Thermostat Housing Assembly with Seal for Chevrolet Optra 2004-2007 Isuzu Amigo
A-Premium®Part # APTHA0051
Thermostat Housing Assembly with Seal for Chevrolet Optra 2004-2007 Isuzu Amigo
4.687 Reviews
$29.99
Low stock: Only 2 left
Edit ZIP code
2-year warranty
90 days free return
Fits 2004 - 2007 Chevrolet Optra, 1999 - 2002 Daewoo Leganza, 1999 - 2002 Daewoo Nubira, 1998 - 2000 Isuzu Amigo, 1998 - 2003 Isuzu Rodeo, 2001 - 2003 Isuzu Rodeo Sport, 2004 - 2008 Suzuki Forenza, 2005 - 2008 Suzuki Reno
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
ColorNatural
ConditionNew
item #1003CW5D
Show less
Heavy Duty Thermostat for Chevrolet LCF 4500HD W3500 Tiltmaster Isuzu GMC 82℃
A-Premium®Part # APTHE085
Heavy Duty Thermostat for Chevrolet LCF 4500HD W3500 Tiltmaster Isuzu GMC 82℃
4.687 Reviews
$23.99
Low stock: Only 3 left
Edit ZIP code
2-year warranty
90 days free return
Fits 1999 - 2004 Chevrolet W5500 Tiltmaster, 1999 - 2004 Chevrolet W4500 Tiltmaster, 2005 - 2008 GMC W3500 Forward, 2005 - 2010 GMC W4500 Forward, 2017 - 2020 Chevrolet LCF 4500XD, 1999 - 2004 GMC W4500 Forward, 2004 - 2004 GMC W5500HD Forward, 2015 - 2019 Isuzu NPR-XD, 2005 - 2009 Isuzu NPR, 1999 - 2004 GMC W3500 Forward, 2005 - 2009 Chevrolet W3500 Tiltmaster, 2005 - 2010 Chevrolet W4500 Tiltmaster, 2005 - 2010 Chevrolet W5500 Tiltmaster, 2005 - 2010 GMC W5500 Forward, 2005 - 2020 Isuzu NRR, 2005 - 2020 Isuzu NQR, 2004 - 2004 Chevrolet W5500HD Tiltmaster, 2018 - 2020 Isuzu FTR, 2017 - 2020 Chevrolet LCF 4500HD, 2018 - 2020 Chevrolet LCF 6500XD
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
ConditionNew
item #101779LW
Note
Start to Open Temperature: 82℃.
Show less
Beck/Arnley 143-0901 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0901
Beck/Arnley 143-0901 Engine Coolant Thermostat
51 Reviews
$32.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1998-1999 Acura SLX, 1998-2002 Honda Passport, 1998-2000 Isuzu Amigo, 1998-2002 Isuzu Trooper, 1999-2001 Isuzu VehiCROSS, 2000-2004 Isuzu Rodeo, 2001-2003 Isuzu Rodeo Sport, 2003-2004 Isuzu Axiom
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
QuantityOne Set
Part interchange
143-0901
item #1000XE6Y
Show less
ÜRO Parts GM0718508 Engine Coolant Thermostat Housing, Upper
ÜRO PartsPart # GM0718508
ÜRO Parts GM0718508 Engine Coolant Thermostat Housing, Upper
52 Reviews
$27.99
Edit ZIP code
3-year warranty
90 days free return
Fits 2004-2007 Buick Rainier, 2002-2006 Cadillac Escalade, 2002-2006 Cadillac Escalade EXT, 2003-2006 Cadillac Escalade ESV, 2004-2005 Cadillac CTS, 2006-2007 Cadillac CTS, 1997-2008 Chevrolet Corvette, 1998-2002 Chevrolet Camaro, 1999-1999 Chevrolet Silverado 2500, 1999-2006 Chevrolet Silverado 1500, 1999-2006 Chevrolet Silverado 1500, 2000-2000 Chevrolet Suburban 2500, 2000-2000 Chevrolet Tahoe, 2000-2000 Chevrolet Tahoe, 2000-2002 Chevrolet Silverado 2500, 2000-2002 Chevrolet Silverado 2500, 2000-2002 Chevrolet Suburban 1500, 2001-2003 Chevrolet Silverado 1500 HD, 2001-2006 Chevrolet Silverado 2500 HD, 2001-2006 Chevrolet Silverado 3500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
Quantity1
Installation PositionUpper
ColorSilver
item #1000ZS32
Show less
Beck/Arnley 143-0686 Engine Coolant Thermostat
Beck/ArnleyPart # 143-0686
Beck/Arnley 143-0686 Engine Coolant Thermostat
51 Reviews
$21.99
Edit ZIP code
3-year warranty
90 days free return
Fits 1982-1982 Chevrolet LUV, 1985-1988 Chevrolet Spectrum, 1989-1989 Geo Spectrum, 1990-1991 Geo Storm, 1992-1993 Geo Storm, 1994-1996 Honda Passport, 1981-1982 Isuzu Pickup, 1981-1984 Isuzu I-Mark, 1983-1987 Isuzu Pickup, 1983-1991 Isuzu Impulse, 1984-1984 Isuzu Trooper, 1985-1985 Isuzu I-Mark, 1985-1985 Isuzu Trooper, 1986-1987 Isuzu Trooper, 1986-1989 Isuzu I-Mark, 1988-1988 Isuzu Trooper, 1988-1990 Isuzu Pickup, 1988-1995 Isuzu Pickup, 1988-1995 Isuzu Pickup, 1989-1991 Isuzu Trooper
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Isuzu
Item LocatedUnited States
QuantityOne Set
Part interchange
143-0686
item #1000XHZN
Show less
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.

Related Blogs

Why Does Coolant Boil After You Turn the Engine Off?

Learn why coolant boils or bubbles after you turn the engine off, how heat soak affects the cooling system, and how to diagnose leaks, trapped air, cap, thermostat, fan, water pump, or head gasket problems.

Jul 29, 2026