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2021 GMC Sierra 2500 HD
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2021 GMC Sierra 2500 HD

2021 GMC Sierra 2500 HD Thermostats

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Showing 1 - 9 of 9 results
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Thermostat
Motorad®
Thermostat
Part Number: MRD448-180
Guaranteed to Fit
$13.99
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Temperature 180F; With Thermostat and Seal; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Temperature 180F; With Thermostat and Seal; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Temperature 180F; With Thermostat and Seal; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Temperature 180F; With Thermostat and Seal; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Temperature 180F; With Thermostat and Seal; Oe Specified Temperature
Product Details
Location : RearQuantity Sold : Sold individuallyWarranty : 12-month Motorad limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Opening Temperature Rating : 180 DegreesRecommended Use : OE Replacement
Thermostat
Motorad®
Thermostat
Part Number: MRD447-185
Guaranteed to Fit
$16.99
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Temperature 185F; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Temperature 185F; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Temperature 185F; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Temperature 185F; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Temperature 185F; Oe Specified Temperature
Product Details
Location : FrontQuantity Sold : Sold individuallyWarranty : 12-month Motorad limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Opening Temperature Rating : 185 degreesRecommended Use : OE Replacement
GM Original Equipment Series Thermostat
AC Delco®
GM Original Equipment Series Thermostat
Part Number: AC131197
Guaranteed to Fit
$23.49
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L
Product Details
Quantity Sold : Sold individuallyWarranty : 24-months or unlimited mile AC Delco limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Opening Temperature Rating : 85 degrees CSeries : GM Original Equipment SeriesMaterial : SteelRecommended Use : OE Replacement
Thermostat
Motorad®
Thermostat
Part Number: MRD523-190
Guaranteed to Fit
$14.49
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Temperature 187F; With Thermostat and Seal; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Temperature 187F; With Thermostat and Seal; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Temperature 187F; With Thermostat and Seal; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Temperature 187F; With Thermostat and Seal; Oe Specified Temperature
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Temperature 187F; With Thermostat and Seal; Oe Specified Temperature
Product Details
Quantity Sold : Sold individuallyWarranty : 12-month Motorad limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Opening Temperature Rating : 187 degreesRecommended Use : OE Replacement
Thermostat
Motorad®
Thermostat
Part Number: MRD523-180
Guaranteed to Fit
$11.99
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Temperature 180F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Temperature 180F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Temperature 180F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Temperature 180F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Temperature 180F; Alternate Temperature Option
Product Details
Quantity Sold : Sold individuallyWarranty : 12-month Motorad limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Opening Temperature Rating : 180 DegreesRecommended Use : OE Replacement
Thermostat
Motorad®
Thermostat
Part Number: MRD523-174
Guaranteed to Fit
$19.49
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Temperature 174F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Temperature 174F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Temperature 174F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Temperature 174F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Temperature 174F; Alternate Temperature Option
Product Details
Quantity Sold : Sold individuallyWarranty : 12-month Motorad limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Opening Temperature Rating : 174 degreesMaterial : Copper/Stainless SteelRecommended Use : OE Replacement
Thermostat
Motorad®
Thermostat
Part Number: MRD447448
Guaranteed to Fit
$36.49
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Temperature 180F And 185F; Oe Specified Temperature; Cylinder Head
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Temperature 180F And 185F; Oe Specified Temperature; Cylinder Head
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Temperature 180F And 185F; Oe Specified Temperature; Cylinder Head
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Temperature 180F And 185F; Oe Specified Temperature; Cylinder Head
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Temperature 180F And 185F; Oe Specified Temperature; Cylinder Head
Product Details
Quantity Sold : Set of 2Warranty : 12-month Motorad limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Opening Temperature Rating : 180 and 185 degrees FRecommended Use : OE Replacement
Thermostat
Motorad®
Thermostat
Part Number: MRD523-160
Guaranteed to Fit
$13.49
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L Temperature 160F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L Temperature 160F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L Temperature 160F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L Temperature 160F; Alternate Temperature Option
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L Temperature 160F; Alternate Temperature Option
Product Details
Quantity Sold : Sold individuallyWarranty : 12-month Motorad limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Opening Temperature Rating : 160 degreesRecommended Use : OE Replacement
GM Original Equipment Series Thermostat
AC Delco®
GM Original Equipment Series Thermostat
Part Number: AC131160
Guaranteed to Fit
$40.99
Vehicle Fitment
  • 2021 GMC Sierra 2500 HD AT4 8 Cyl 6.6L 6-Speed, Automatic Transmission, transmissionmfrcode : 6L90
  • 2021 GMC Sierra 2500 HD SLT 8 Cyl 6.6L 6-Speed, Automatic Transmission, transmissionmfrcode : 6L90
  • 2021 GMC Sierra 2500 HD Denali 8 Cyl 6.6L 6-Speed, Automatic Transmission, transmissionmfrcode : 6L90
  • 2021 GMC Sierra 2500 HD SLE 8 Cyl 6.6L 6-Speed, Automatic Transmission, transmissionmfrcode : 6L90
  • 2021 GMC Sierra 2500 HD Base 8 Cyl 6.6L 6-Speed, Automatic Transmission, transmissionmfrcode : 6L90
Product Details
Notes : Includes SealQuantity Sold : Sold individuallyWarranty : 24-months or unlimited mile AC Delco limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Opening Temperature Rating : 86 degrees CSeries : GM Original Equipment SeriesMaterial : Stainless SteelRecommended Use : OE Replacement
Page 1 of 1 | Showing 1 - 9 of 9 results

Top Rated Products

AC Delco GM Original Equipment Series Thermostat
$40.99( Review)
Had no problems installing it, quick and fast and good price. Can’t ask for more.
Paul P.
VERIFIED PURCHASER

Popular Products

Product Questions & Answers

AC Delco GM Original Equipment Series Thermostat
$40.99
Q:I don't see my 2007 GMC ENVOY DENALI 5.3L in your fit section for a thermostat.  Is this an exact fit or not? Show Less
Robert M.
A:BEST ANSWERHi Robert, I'm glad to assist you. This is an exact fit. It is stated that this is a guaranteed fit for the 2007 Envoy Denali models. Click on the link below for direct ordering to take advantage of our ongoing discount and limited stocks. I hope this helps, and happy shopping. https://www.carparts.com/thermostat/ac-delco/ac131160?can=CPAE1047_CSQA_20240321 Show less
Arnel E.
 
1 Question, 1 AnswerView all Q&As >

Helpful Automotive Resources

P0597 Code: Thermostat Heater Control Circuit / Open
P0597 Code: Thermostat Heater Control Circuit / OpenDiagnostic trouble code (DTC) P0597 code stands for “Thermostat Heater Control Circuit/Open.”
What Does It Mean When the Engine Is Hot While the AC Is Off?
What Does It Mean When the Engine Is Hot While the AC Is Off?If you’re wondering how your engine gets so hot even if the air conditioning is off, then there are many explanations as to why. Usually, it’s due to a lack of coolant. In other cases, the culprit for an overheating engine is broken parts. Here are some of the potential
What Does Check Gauges Mean?
What Does Check Gauges Mean?The check gauge light is usually triggered once the PCM detects something reading that’s outside normal parameters. These readings include: Coolant TemperatureEngine RPMFuel LevelOil PressureTransmission temperatureTire PressureWheel SpeedVoltmeter Common Triggers of the Check Gauges Light
What Causes a Car to Overheat When Idling?
What Causes a Car to Overheat When Idling?Leaving your AC running may contribute to this problem because the car’s AC forces the engine to work harder. These factors combined can make the engine overheat very quickly. A simple solution would be to turn off the AC in hopes of lowering the temperature of the engine, but if
Why Is My Car Heater Not Blowing Hot Air?
Why Is My Car Heater Not Blowing Hot Air?The heater core distributes heat, blowing it into the air with a blower fan. In many ways, you could compare the heater core to a radiator because they are both heat exchangers. Damaged heater cores often go hand in hand with coolant problems.
Where Is the Thermostat Located?
Where Is the Thermostat Located?Have you driven your vehicle recently? Because if the answer’s yes, you’ll want to turn off the engine and let it cool down before trying to access the thermostat. This is because you’ll have to unclamp your radiator hose and drain your coolant before you can get to your thermostat.