BlackFriday2025Notice
24/7 Customer service
USD
Add your vehicle
Address
Login
Cart
Item
$0.00
A-Premium Cyber Monday Banner
Shopping for Workhorse Custom Chassis
ADD VEHICLE DETAILS

Thermostat

7items
  • All filters
  • Sort By
  • Price
  • Placement on Vehicle
  • Brand
  • Material
  • Color
  • Warranty
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
4.544 Reviews
$20.99
$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
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Workhorse Custom Chassis
Item LocatedUnited States
Quantity1
MaterialAluminum
ColorNatural
ConditionNew
item #1015204K
Show less
A-Premium APTHE057 Engine Coolant Thermostat
A-Premium®Part # APTHE057
A-Premium APTHE057 Engine Coolant Thermostat
4.544 Reviews
$18.99
$20.99
Quantity Less than 5
Edit ZIP code
2-year warranty
90 days free return
Fits 2003 - 2009 Chevrolet C4500 Kodiak, 2003 - 2009 Chevrolet C5500 Kodiak, 2006 - 2016 Chevrolet Express 2500, 2006 - 2016 Chevrolet Express 3500, 2009 - 2016 Chevrolet Express 4500, 2001 - 2024 Chevrolet Silverado 2500 HD, 2007 - 2007 Chevrolet Silverado 2500 HD Classic, 2001 - 2006 Chevrolet Silverado 3500, 2007 - 2007 Chevrolet Silverado 3500 Classic, 2007 - 2024 Chevrolet Silverado 3500 HD, 2019 - 2020 Chevrolet Silverado 4500 HD, 2019 - 2020 Chevrolet Silverado 5500 HD, 2019 - 2020 Chevrolet Silverado 6500 HD, 2003 - 2009 GMC C4500 Topkick, 2003 - 2009 GMC C5500 Topkick, 2006 - 2016 GMC Savana 2500, 2006 - 2016 GMC Savana 3500, 2009 - 2016 GMC Savana 4500, 2001 - 2024 GMC Sierra 2500 HD, 2007 - 2007 GMC Sierra 2500 HD Classic, 2001 - 2006 GMC Sierra 3500, 2007 - 2007 GMC Sierra 3500 Classic, 2007 - 2023 GMC Sierra 3500 HD, 2006 - 2006 Hummer H1, 2019 - 2020 International Harvester CV515, 2005 - 2011 Workhorse LF72, 2005 - 2005 Workhorse Custom Chassis P42, 2007 - 2007 Workhorse Custom Chassis W72
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Workhorse Custom Chassis
Item LocatedUnited States
Quantity1
MaterialMetal and Rubber
ConditionNew
item #1005V1U4
Show less
Thermostat Housing Assembly for Chevy Silverado 1500 Avalanche 1500 Camaro Buick
A-Premium®Part # APTHA0131
Thermostat Housing Assembly for Chevy Silverado 1500 Avalanche 1500 Camaro Buick
4.544 Reviews
$37.99
$39.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2008 - 2009 Buick Allure, 2008 - 2009 Buick LaCrosse, 2004 - 2006 Buick Rainier, 2004 - 2005 Cadillac CTS, 2006 - 2007 Cadillac CTS, 2002 - 2005 Cadillac Escalade, 2002 - 2006 Cadillac Escalade, 2003 - 2006 Cadillac Escalade ESV, 2002 - 2006 Cadillac Escalade EXT, 2002 - 2006 Chevrolet Avalanche, 1998 - 2002 Chevrolet Camaro, 1997 - 2004 Chevrolet Corvette, 2005 - 2007 Chevrolet Corvette, 2008 - 2008 Chevrolet Corvette, 2006 - 2008 Chevrolet Corvette, 2003 - 2006 Chevrolet Express 1500, 2003 - 2006 Chevrolet Express 2500, 2003 - 2005 Chevrolet Express 2500, 2003 - 2006 Chevrolet Express 2500, 2003 - 2006 Chevrolet Express 3500, 2003 - 2006 Chevrolet Express 3500, 2003 - 2006 Chevrolet Express 3500, 2006 - 2009 Chevrolet Impala, 2006 - 2007 Chevrolet Monte Carlo, 1999 - 2006 Chevrolet Silverado 1500, 1999 - 2006 Chevrolet Silverado 1500, 2003 - 2006 Chevrolet Silverado 1500, 2007 - 2007 Chevrolet Silverado 1500 Classic, 2007 - 2007 Chevrolet Silverado 1500 Classic, 2007 - 2007 Chevrolet Silverado 1500 Classic, 2005 - 2006 Chevrolet Silverado 1500 HD, 2001 - 2003 Chevrolet Silverado 1500 HD, 2007 - 2007 Chevrolet Silverado 1500 HD Classic, 1999 - 2000 Chevrolet Silverado 2500, 2003 - 2003 Chevrolet Silverado 2500, 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 - 2004 Chevrolet SSR, 2005 - 2006 Chevrolet SSR, 2000 - 2006 Chevrolet Suburban 1500, 2006 - 2006 Chevrolet Suburban 1500, 2000 - 2006 Chevrolet Suburban 2500, 2000 - 2006 Chevrolet Tahoe, 2000 - 2006 Chevrolet Tahoe, 2006 - 2006 Chevrolet Trailblazer, 2006 - 2006 Chevrolet Trailblazer, 2003 - 2006 Chevrolet Trailblazer EXT, 2005 - 2006 Chevrolet W3500 Tiltmaster, 2003 - 2003 Chevrolet W3500 Tiltmaster, 2003 - 2006 Chevrolet W4500 Tiltmaster, 2006 - 2012 Workhorse Custom Chassis W42, 2006 - 2010 Workhorse Custom Chassis W42, 2011 - 2012 Workhorse Custom Chassis W62
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Workhorse Custom Chassis
Item LocatedUnited States
Quantity1
MaterialAluminum
Part interchange
902-2836, 524KT, 86220, 1511057, 12600172, 12568911, 12581594, 12600178, 
...View more
item #10021TUK
Note
This item comes with a Cover.
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
4.544 Reviews
$13.99
$14.99
Only 1 item left in stock
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, 1996 - 1999 Chevrolet K1500, 1996 - 2002 Chevrolet Express 1500, 2007 - 2007 Chevrolet Silverado 1500 Classic, 1996 - 2002 Chevrolet Express 2500, 1998 - 2000 Chevrolet C2500, 1996 - 2005 Chevrolet Astro, 1996 - 1999 Chevrolet C1500, 1996 - 1996 Chevrolet K2500, 1996 - 2000 Chevrolet K2500, 1996 - 1999 Chevrolet K1500 Suburban, 1996 - 2000 Chevrolet C3500, 1996 - 2000 Chevrolet Tahoe, 2002 - 2002 Chevrolet Express 3500, 1996 - 1999 Chevrolet P30, 2006 - 2006 Chevrolet Express 2500, 2001 - 2001 Chevrolet Express 3500, 1996 - 2004 Chevrolet Express 2500, 1996 - 2014 Chevrolet Express 1500, 1996 - 2002 Chevrolet Express 3500, 1999 - 2013 Chevrolet Silverado 1500, 1996 - 2004 Chevrolet S10, 1996 - 1999 Chevrolet K2500 Suburban, 2001 - 2001 Chevrolet Express 2500, 1996 - 1999 Chevrolet C1500 Suburban, 1996 - 2000 Chevrolet K3500, 1996 - 1998 Chevrolet K2500
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Workhorse Custom Chassis
Item LocatedUnited States
Quantity1
MaterialPlastic
Part interchange
12257859, 12563335, 12597583, 12632948, 34769
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 for Chevrolet Silverado 3500 GMC Sierra 2500 HD Hummer
A-Premium®Part # APTHE058
Engine Coolant Thermostat for Chevrolet Silverado 3500 GMC Sierra 2500 HD Hummer
4.544 Reviews
$16.99
$17.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Fits 2003 - 2009 Chevrolet C4500 Kodiak, 2003 - 2009 Chevrolet C5500 Kodiak, 2006 - 2016 Chevrolet Express 2500, 2006 - 2016 Chevrolet Express 3500, 2009 - 2016 Chevrolet Express 4500, 2001 - 2024 Chevrolet Silverado 2500 HD, 2007 - 2007 Chevrolet Silverado 2500 HD Classic, 2001 - 2006 Chevrolet Silverado 3500, 2007 - 2007 Chevrolet Silverado 3500 Classic, 2007 - 2024 Chevrolet Silverado 3500 HD, 2019 - 2020 Chevrolet Silverado 4500 HD, 2019 - 2020 Chevrolet Silverado 5500 HD, 2019 - 2020 Chevrolet Silverado 6500 HD, 2003 - 2009 GMC C4500 Topkick, 2003 - 2009 GMC C5500 Topkick, 2006 - 2016 GMC Savana 2500, 2006 - 2016 GMC Savana 3500, 2009 - 2016 GMC Savana 4500, 2018 - 2018 GMC Sierra 2500 HD, 2001 - 2017 GMC Sierra 2500 HD, 2019 - 2024 GMC Sierra 2500 HD, 2007 - 2007 GMC Sierra 2500 HD Classic, 2001 - 2006 GMC Sierra 3500, 2007 - 2007 GMC Sierra 3500 Classic, 2018 - 2018 GMC Sierra 3500 HD, 2007 - 2017 GMC Sierra 3500 HD, 2019 - 2023 GMC Sierra 3500 HD, 2006 - 2006 Hummer H1, 2019 - 2020 International Harvester CV515, 2005 - 2011 Workhorse LF72, 2005 - 2005 Workhorse Custom Chassis P42, 2007 - 2007 Workhorse Custom Chassis W72
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Workhorse Custom Chassis
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DUEH
Show less
ÜRO Parts GM0718508 Engine Coolant Thermostat Housing, Upper
ÜRO PartsPart # GM0718508
ÜRO Parts GM0718508 Engine Coolant Thermostat Housing, Upper
4.410 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, 2001-2006 Chevrolet Suburban 2500, 2001-2006 Chevrolet Tahoe, 2002-2006 Chevrolet Avalanche 1500, 2003-2005 Chevrolet Express 2500, 2003-2005 Chevrolet Express 3500, 2003-2006 Chevrolet Express 1500, 2003-2006 Chevrolet Express 2500, 2003-2006 Chevrolet Express 2500, 2003-2006 Chevrolet SSR, 2003-2006 Chevrolet Silverado 1500, 2003-2006 Chevrolet Silverado 2500, 2003-2006 Chevrolet Suburban 1500, 2003-2006 Chevrolet Trailblazer EXT, 2003-2006 Chevrolet W3500 Tiltmaster, 2003-2006 Chevrolet W4500 Tiltmaster, 2004-2006 Chevrolet Sonora, 2005-2006 Chevrolet Silverado 1500 HD, 2006-2006 Chevrolet Express 3500, 2006-2006 Chevrolet Express 3500, 2006-2006 Chevrolet Express 3500, 2006-2006 Chevrolet Trailblazer, 2006-2006 Chevrolet Trailblazer, 2007-2007 Chevrolet Silverado 1500 Classic, 2007-2007 Chevrolet Silverado 1500 Classic, 2007-2007 Chevrolet Silverado 1500 Classic, 2007-2007 Chevrolet Silverado 1500 HD Classic, 2007-2007 Chevrolet Silverado 2500 HD Classic, 2007-2007 Chevrolet Silverado 3500 Classic, 2007-2007 Chevrolet Silverado 3500 HD, 2007-2009 Chevrolet Silverado 2500, 1999-2004 GMC Sierra 2500, 1999-2006 GMC Sierra 1500, 1999-2006 GMC Sierra 1500, 2000-2000 GMC Yukon, 2000-2000 GMC Yukon, 2000-2000 GMC Yukon XL 2500, 2000-2006 GMC Yukon XL 1500, 2001-2003 GMC Sierra 1500 HD, 2001-2006 GMC Sierra 1500, 2001-2006 GMC Sierra 2500 HD, 2001-2006 GMC Sierra 3500, 2001-2006 GMC Yukon, 2001-2006 GMC Yukon XL 2500, 2003-2005 GMC Savana 2500, 2003-2005 GMC Savana 3500, 2003-2006 GMC Envoy XL, 2003-2006 GMC Savana 1500, 2003-2006 GMC Savana 2500, 2003-2006 GMC Savana 2500, 2003-2006 GMC W4500 Forward, 2004-2005 GMC Envoy XUV, 2004-2006 GMC W3500 Forward, 2005-2006 GMC Envoy, 2005-2006 GMC Sierra 1500 HD, 2006-2006 GMC Savana 3500, 2006-2006 GMC Savana 3500, 2007-2007 GMC Sierra, 2007-2007 GMC Sierra 1500 Classic, 2007-2007 GMC Sierra 1500 Classic, 2007-2007 GMC Sierra 1500 Classic, 2007-2007 GMC Sierra 1500 HD Classic, 2007-2007 GMC Sierra 2500 HD Classic, 2007-2007 GMC Sierra 3500 Classic, 2008-2008 GMC Sierra, 2003-2006 Hummer H2, 2003-2006 Isuzu Ascender, 2003-2006 Isuzu NPR, 2003-2006 Isuzu NPR-HD, 1998-2002 Pontiac Firebird, 2004-2006 Pontiac GTO, 2008-2009 Pontiac G8, 2005-2006 Saab 9-7x, 2004-2004 Workhorse FasTrack FT1061, 2004-2005 Workhorse FasTrack FT1461, 2004-2005 Workhorse FasTrack FT1461, 2004-2005 Workhorse FasTrack FT1601, 2004-2005 Workhorse FasTrack FT1801, 2005-2005 Workhorse FasTrack FT1061, 2005-2005 Workhorse FasTrack FT1261, 2006-2006 Workhorse W42, 2006-2008 Workhorse W16, 2006-2008 Workhorse W18, 2007-2011 Workhorse W42, 2007-2011 Workhorse W62, 2006-2006 Workhorse Custom Chassis W42, 2006-2006 Workhorse Custom Chassis W42, 2007-2012 Workhorse Custom Chassis W42, 2011-2012 Workhorse Custom Chassis W62
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Workhorse Custom Chassis
Item LocatedUnited States
Quantity1
Installation PositionUpper
MaterialA384
ColorSilver
Part interchange
GM0718508, 12581594, 12600172, 1511057, 12568911, 8125689110, 8125815940, 8126001720, 
...View more
item #1000ZS32
Show less
Engine Coolant Thermostat for Chevrolet C2500 GMC C3500HD Buick Century Pontiac
A-Premium®Part # APTHE082
Engine Coolant Thermostat for Chevrolet C2500 GMC C3500HD Buick Century Pontiac
4.544 Reviews
$18.99
$20.99
Edit ZIP code
2-year warranty
90 days free return
Fits 2010 - 2010 Blue Bird Vision School Bus, 1987 - 1989 Buick Century, 1991 - 1992 Buick Century, 1994 - 2005 Buick Century, 1988 - 1996 Buick Regal, 2002 - 2007 Buick Rendezvous, 1994 - 1998 Buick Skylark, 2005 - 2006 Buick Terraza, 1987 - 1988 Cadillac Cimarron, 2002 - 2006 Chevrolet Avalanche 2500, 1999 - 2002 Chevrolet B7, 1987 - 1993 Chevrolet Beretta, 1995 - 1996 Chevrolet Beretta, 1996 - 2000 Chevrolet C2500, 1996 - 1999 Chevrolet C2500 Suburban, 1996 - 2000 Chevrolet C3500, 1996 - 2002 Chevrolet C3500HD, 2003 - 2009 Chevrolet C4500 Kodiak, 2003 - 2005 Chevrolet C5500 Kodiak, 1999 - 2009 Chevrolet C6500 Kodiak, 1999 - 2009 Chevrolet C7500 Kodiak, 2003 - 2009 Chevrolet C8500, 1987 - 1994 Chevrolet Cavalier, 1987 - 1990 Chevrolet Celebrity, 1987 - 1996 Chevrolet Corsica, 2005 - 2009 Chevrolet Equinox, 1996 - 2002 Chevrolet Express 3500, 2000 - 2005 Chevrolet Impala, 1996 - 2000 Chevrolet K2500, 1996 - 1999 Chevrolet K2500 Suburban, 1996 - 2000 Chevrolet K3500, 1990 - 2001 Chevrolet Lumina, 1990 - 1996 Chevrolet Lumina APV, 1997 - 2006 Chevrolet Malibu, 1995 - 2005 Chevrolet Monte Carlo, 1996 - 1999 Chevrolet P30, 2001 - 2006 Chevrolet Silverado 2500 HD, 2007 - 2007 Chevrolet Silverado 2500 HD Classic, 2001 - 2006 Chevrolet Silverado 3500, 2007 - 2007 Chevrolet Silverado 3500 Classic, 2001 - 2006 Chevrolet Suburban 2500, 2005 - 2006 Chevrolet Uplander, 1997 - 2005 Chevrolet Venture, 1999 - 2002 GMC B7, 1996 - 2000 GMC C2500, 1996 - 1999 GMC C2500 Suburban, 1996 - 2000 GMC C3500, 1996 - 2002 GMC C3500HD, 2003 - 2009 GMC C4500 Topkick, 2003 - 2009 GMC C5500 Topkick, 1999 - 2009 GMC C6500 Topkick, 1999 - 2009 GMC C7500 Topkick, 2003 - 2009 GMC C8500 Topkick, 1996 - 2000 GMC K2500, 1996 - 1999 GMC K2500 Suburban, 1996 - 2000 GMC K3500, 1996 - 1999 GMC P3500, 1996 - 2002 GMC Savana 3500, 2001 - 2006 GMC Sierra 2500 HD, 2007 - 2007 GMC Sierra 2500 HD Classic, 2001 - 2006 GMC Sierra 3500, 2007 - 2007 GMC Sierra 3500 Classic, 2001 - 2006 GMC Yukon XL 2500, 1994 - 1998 Oldsmobile Achieva, 1999 - 2004 Oldsmobile Alero, 1997 - 1999 Oldsmobile Cutlass, 1987 - 1989 Oldsmobile Cutlass Ciera, 1994 - 1996 Oldsmobile Cutlass Ciera, 1994 - 1994 Oldsmobile Cutlass Cruiser, 1987 - 1989 Oldsmobile Cutlass Cruiser, 1988 - 1997 Oldsmobile Cutlass Supreme, 1987 - 1987 Oldsmobile Firenza, 1990 - 1994 Oldsmobile Silhouette, 1996 - 2004 Oldsmobile Silhouette, 1987 - 1991 Pontiac 6000, 2001 - 2005 Pontiac Aztek, 2005 - 2006 Pontiac G6, 1994 - 2005 Pontiac Grand Am, 1988 - 2003 Pontiac Grand Prix, 1999 - 2006 Pontiac Montana, 1991 - 1994 Pontiac Sunbird, 1987 - 1991 Pontiac Tempest, 2006 - 2009 Pontiac Torrent, 1990 - 1999 Pontiac Trans Sport, 2005 - 2006 Saturn Relay, 1999 - 2005 Workhorse P32, 1999 - 2005 Workhorse P42, 2007 - 2009 Workhorse R26, 2006 - 2009 Workhorse W16, 2006 - 2009 Workhorse W18, 2001 - 2009 Workhorse W20, 2007 - 2009 Workhorse W21, 2001 - 2009 Workhorse W22, 2004 - 2009 Workhorse W24, 2005 - 2009 Workhorse W25, 1999 - 2007 Workhorse Custom Chassis P32, 2007 - 2008 Workhorse Custom Chassis R26, 2006 - 2010 Workhorse Custom Chassis W18, 2001 - 2011 Workhorse Custom Chassis W22, 2011 - 2011 Workhorse Custom Chassis W24, 2004 - 2005 Workhorse Custom Chassis W24, 2007 - 2009 Workhorse Custom Chassis W24, 2002 - 2005 Workhorse Custom Chassis W52, 2007 - 2010 Workhorse Custom Chassis W62, 2006 - 2006 Workhorse Custom Chassis W72
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: Workhorse Custom Chassis
Item LocatedUnited States
Quantity1
ConditionNew
item #1013DTY2
Show less

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.