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2003 Hummer H2
1
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Price Match Guarantee
60-Day Returns
Lifetime Replacement
Price Match Guarantee
60-Day Returns
Lifetime Replacement
2003 Hummer H2

2003 Hummer H2 Thermostats

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3-Piece Kit Radiator, 4.8L/5.3L/6.0L Engines, Plastic Tank, with Coolant Reservoir and Thermostat
Replacement
3-Piece Kit Radiator, 4.8L/5.3L/6.0L Engines, Plastic Tank, with Coolant Reservoir and Thermostat
Part Number: KIT-052623-86
Guaranteed to Fit
$193.49
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L
Product Details
Notes : Radiator - Please measure your Radiator size before ordering.; Thermostat - Includes housing; Coolant Reservoir - With CapCore Dimensions : 34 x 17.25 x 1 in. Core SizeComponents : (1) Coolant Reservoir, (1) Radiator, and (1) ThermostatAutomatic Transmission Cooler : With Transmission CoolerEngine Oil Cooler : With Engine Oil CoolerInlet Size : 1.31 in. InletOutlet Location : Bottom right outletRecommended Use : OE ReplacementNumberof Rows : 1-Row CoreTank Material : Plastic TankCore Material : Aluminum CoreColor Finish : Factory FinishOutlet Size : 1.56 in. OutletInlet Location : Top left inletReplaces DPI Number : DPI# 2370Product Fit : Direct FitQuantity Sold : KitReplaces OE Number : 22840116, 15808716-PFM, 12571261Replaces Partslink Number : GM3010274, GM3014121Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead and lead compounds, 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.

Promotions : Collision Parts SavingsReturns Policy : 30-Day Return PolicyCore Height : 34 in.Core Width : 17 1/4 in.Core Thickness : 1 in.Interchange Part Number : 3728, CU2370, 22840116, GM3010274, 15808716-PFM, GM3014121, 902700, 12571261
Thermostat
Motorad®
Thermostat
Part Number: MRD524-160
Guaranteed to Fit
$24.49
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L Temperature 160F; With Replacement Late Model Water Pump Requiring Separate Thermostat And Housing; Thermostat Only; 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
4-Seasons OE Replacement Thermostat
4-Seasons®
4-Seasons OE Replacement Thermostat
Part Number: FS85580
Guaranteed to Fit
$28.49
Vehicle Fitment
  • 2003 Hummer H2 All Submodels All Engines With Thermostat
Product Details
Notes : 0.4 in. Mounting Flange Thickness; 1.22 in. Inlet Diameter; 2.4 in. Overall Height; Integrated Thermostat Housing TypeQuantity Sold : Sold individuallyWarranty : 120-day 4-Seasons 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.

Series : 4-Seasons OE ReplacementMaterial : AluminumRecommended Use : OE Replacement
Thermostat
Motorad®
Thermostat
Part Number: MRD456-187
Guaranteed to Fit
$18.49
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L Temperature 187F; With Thermostat and Seal; With Replacement Late Model Water Pump Requiring Seperate Thermostat and Housing; 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
Gates OE Replacement Thermostat
Gates®
Gates OE Replacement Thermostat
Part Number: GAT34702
Guaranteed to Fit
$60.49
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L GAS, With GM Updated Replacement Water Pump, Includes Housing, 187 Degree
Product Details
Notes : 1.18 in. outlet ID; 1.55 in. outlet OD; Includes jiggle pin; With (1) seal and (2) bolt holes; Integrated housing thermostat typeQuantity Sold : Sold individuallyWarranty : Lifetime Gates 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.

Promotions : Cooling EssentialsOpening Temperature Rating : 187 degreesSeries : Gates OE ReplacementMaterial : Stainless SteelRecommended Use : OE Replacement
UltraStat Series Thermostat
Motorad®
UltraStat Series Thermostat
Part Number: MRD5456-187
Guaranteed to Fit
$13.49
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L Temperature 187F; With Replacement Late Model Water Pump Requiring Separate Thermostat And Housing; Thermostat Only; 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 degreesSeries : UltraStat SeriesRecommended Use : OE Replacement
Thermostat
Motorad®
Thermostat
Part Number: MRD456-160
Guaranteed to Fit
$18.99
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L Temperature 160F; With Replacement Late Model Water Pump Requiring Seperate Thermostat and Housing; 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
Fail-Safe Thermostat Series Thermostat
Motorad®
Fail-Safe Thermostat Series Thermostat
Part Number: MRD7456-187
Guaranteed to Fit
$15.99
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L Temperature 187F; With Replacement Late Model Water Pump Requiring Separate Thermostat And Housing; Thermostat Only; 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 degreesSeries : Fail-Safe Thermostat SeriesRecommended Use : OE Replacement
Thermostat
Motorad®
Thermostat
Part Number: MRD456-180
Guaranteed to Fit
$19.99
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L Temperature 180F; With Replacement Late Model Water Pump Requiring Separate Thermostat And Housing; Thermostat Only; 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
Professional Series Thermostat
AC Delco®
Professional Series Thermostat
Part Number: AC12T121D
Guaranteed to Fit
$24.49
Vehicle Fitment
  • 2003 Hummer H2 All Submodels All Engines With Replacement Late Model Water Pump Requiring Seperate Thermostat and Housing
Product Details
Notes : Includes seal; Thermostat only; OEM recommended temperature; Standard; With replacement late model water pump requiring separate thermostat and housingQuantity 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 : Professional SeriesMaterial : Stainless SteelRecommended Use : OE Replacement
Gates OE Replacement Thermostat
Gates®
Gates OE Replacement Thermostat
Part Number: GAT33910
Guaranteed to Fit
$20.49
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L GAS, With Original Equipment or Most Aftermarket Water Pumps, 186 Degree
Product Details
Prop 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.

Promotions : Cooling EssentialsOpening Temperature Rating : 186 degreesSeries : Gates OE ReplacementRecommended Use : OE Replacement
Gates OE Replacement Thermostat
Gates®
Gates OE Replacement Thermostat
Part Number: GAT33963
Guaranteed to Fit
$9.49
Vehicle Fitment
  • 2003 Hummer H2 Base 8 Cyl 6.0L GAS, With GM Updated Replacement Water Pump, Excludes Housing, 186 Degree
Product Details
Prop 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.

Promotions : Cooling EssentialsOpening Temperature Rating : 186 degreesSeries : Gates OE ReplacementRecommended Use : OE Replacement
Page 1 of 1 | Showing 1 - 12 of 12 results

Top Rated Products

Motorad UltraStat Series Thermostat
$13.49( Review)
Im satisfied
Jennifer J.
VERIFIED PURCHASER

Popular Products

Product Questions & Answers

Gates Gates OE Replacement Thermostat
$9.49
Q:Does this thermostat stays open if it goes bad?
Crystal S.
A:BEST ANSWERHi Crystal, I'm glad to be of assistance to you. When the thermostat fails, it can either stay open or closed. If the thermostat is stuck in the open position, coolant flows continuously into the radiator, causing the engine to run cold. If interested in this part, use the link below to order at 49% off the regular price today while supplies last. I hope this is helpful. Enjoy your CarParts.com online shopping experience! https://www.carparts.com/thermostat/gates/gat33963?can=CPGG4850_CSQA_20230111 Show less
Grace G.
 
3 Questions, 1 AnswerView all Q&As >
Gates Gates OE Replacement Thermostat
$20.49
Q:Does this come  with seal?
Gene K.
A:BEST ANSWERHi Gene, As per the manufacturer, this item comes with a seal.
Aldrin P.
 
3 Questions, 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.