Radiator & Components for 2025 GMC Sierra 2500 HD
1. ACDelcoâ„¢ Radiator 
2. Auxiliary Radiator 
3. Block Heater 
4. Lower Baffle Bolt 
5. Lower Baffle Bolt 
6. Inlet Hose 
7. Insulator 
8. Cap 
9. Cap 
10. Reservoir Cap 
11. Reservoir Cap 
12. Cap 
13. Reservoir Cap 
14. Reservoir Cap 
15. Reservoir Cap 
16. Reservoir Cap 
17. Reservoir Cap 
18. Reservoir Cap 
19. Reservoir Cap 
20. Reservoir Cap 
21. Reservoir Cap 
22. Cap 
23. Reservoir Cap 
24. Shutter Bolt 
25. Shutter Bolt 
26. Reservoir Cap 
27. Reservoir Cap 
28. Lower Shutter Bolt 
29. Reservoir Cap 
30. Reservoir Cap 
31. Reservoir Cap 
32. Reservoir Cap 
33. Reservoir Cap 
34. Reservoir Cap 
35. Reservoir Cap 
36. Reservoir Cap 37. Lower Baffle Bolt No.
Part # / Description / Price
Price
N/A
F (S)Heater 
GM
GM Description: GM Heater (Part Number: 12705875) is listed as an engine-cooling/heater assembly component per master description records. Application: Identified as an engine-cool/heater assembly component—factory replacement part for cooling/heating subassembly requir ...
MSRP $134.35
$85.01
MSRP $134.35
$85.01
N/A
By-Pass Pipe GM
GM Description: 6.6L diesel. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
MSRP $80.00
$45.60
MSRP $80.00
$45.60
N/A
Radiator Drain Petcock GM
GM Description: GM Genuine Parts Radiator Drain Petcock (Part Number: 22790134) is an OEM radiator drain valve designed to allow controlled coolant draining for maintenance and service. Type: Radiator drain petcock / drain plugFunction: Enables controlled drainage of cool ...
MSRP $24.48
$17.63
MSRP $24.48
$17.63
N/A
Engine Auxiliary Radiator GM
GM Description: GM Genuine Parts Engine Auxiliary Radiator (Part Number: 84098260) is an OE auxiliary radiator designed for fuel cooling and supplemental engine cooling on heavy-duty diesel applications. Type: Auxiliary radiator assemblyApplications: Specified for 6.6L di ...
MSRP $316.67
$208.05
MSRP $316.67
$208.05
N/A
Shutter GM
GM Description: GM Genuine Parts Shutter (Part Number: 85021606) is a front bumper shutter assembly used to control airflow and close openings when required. Type: Shutter assembly (front bumper)Function: Regulates airflow for cooling efficiency and aerodynamic controlMaster description: "SHUTTER ASM-FRT BPR"Buy from World Parts Direct—an American company providing great prices, an OEM compatibility guarantee, and expert assistance for body components.
$199.02
$199.02
N/A
Outlet Hose GM
GM Description: 6.6L diesel, fuel cooling. Silverado, Sierra 2500 HD. Outlet. Silverado, Sierra 3500 HD. Auxiliary Radiator. Emission Reduction Fluid Injector Cooling.
MSRP $197.46
$129.72
MSRP $197.46
$129.72
N/A
Inlet Hose GM
GM Description: GM Genuine Parts Auxiliary Radiator Inlet Hose (Part Number: 85119160) is an OE radiator inlet hose supplying coolant to auxiliary radiator or fuel-cooling circuits. Application: For specified diesel engines and fuel-cooling applications on Silverado/Sierr ...
MSRP $133.53
$88.92
MSRP $133.53
$88.92
1
Engine Radiator GM
GM Description: GM Genuine Parts Engine Radiator (Part Number: 85610318) is a factory radiator assembly designed for heavy-duty Silverado and Sierra 2500/3500 HD diesel applications. It is engineered to manage engine coolant flow and heat rejection for heavy-duty engine c ...
MSRP $879.94
$575.49
MSRP $879.94
$575.49
2
Radiator Inlet Hose GM
GM Description: Manufactured to GM OE specification for fit, form, and function
MSRP $37.85
$25.89
MSRP $37.85
$25.89
3
Radiator Coolant Hose GM
GM Description: GM Genuine Parts Radiator Outlet Hose (Part Number: 85119169) is a radiator outlet hose designed for engine cooling circuits on specified heavy-duty Silverado and Sierra diesel models. Function: Routes coolant from the radiator outlet to engine components ...
MSRP $175.56
$115.34
MSRP $175.56
$115.34
5
Expansion Tank GM
GM Description: Silverado, Sierra 2500 HD. 6.6L diesel, engine cooling. Silverado, Sierra 3500 HD.
MSRP $98.07
$65.31
MSRP $98.07
$65.31
6
Engine Coolant Thermostat GM
GM Description: GM Genuine Parts Engine Coolant Thermostat (Part Number: 12680456) is an engine coolant thermostat assembly that regulates coolant flow through the radiator to help the engine reach and maintain optimal operating temperature. Type: Caps (Coolant & Oil ...
MSRP $16.72
$10.03
MSRP $16.72
$10.03
6
Engine Coolant Thermostat GM
GM Description: GM Genuine Parts Engine Coolant Thermostat (Part Number: 12680457) is a factory thermostat assembly designed to regulate engine coolant temperature by controlling coolant flow to the radiator. Built to meet factory temperature and fit specifications (180° ...
MSRP $17.12
$10.27
MSRP $17.12
$10.27
7
Engine Coolant Thermostat O-Ring GM
GM Description: GM Genuine Parts Engine Coolant Thermostat O-Ring (Part Number: 12680544) is an OE-quality seal that prevents coolant leakage from the thermostat housing. It is intended to maintain a reliable coolant seal at the thermostat cover. Function: O-ring seal for ...
MSRP $14.00
$8.40
MSRP $14.00
$8.40
8
Thermostat Housing GM
GM Description: 6.6L diesel. Silverado, sierra. 6.6l. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
MSRP $209.30
$114.59
MSRP $209.30
$114.59
9
Water Outlet GM
GM Description: Manufactured to GM OE specification for fit, form, and function
MSRP $91.26
$52.02
MSRP $91.26
$52.02
10
Engine Water Pump GM
GM Notes: Includes Thermostat Housing.
Description: ACDelco Engine Water Pump (Part Number: 12680257)Type: Engine Water PumpFunction: Circulates engine coolant to maintain proper engine temperature and support cooling-system performanceNotes: Applications include Silverado/Sierra 6.6L diesel 2500/3500 HD; d ...
MSRP $296.72
$162.47
MSRP $296.72
$162.47
11
Water Pump Cover Seal GM
GM Description: ACDelco Water Pump Cover Seal (Part Number: 12643779) is an O-ring style seal for water pump cover connections designed to maintain a coolant-tight joint. Type: O-ring / water pump cover seal (gasket)Function: Forms a sealed connection for coolant passages ...
MSRP $8.20
$4.92
MSRP $8.20
$4.92
11
Water Pump Outlet Pipe Gasket GM
GM Description: GM Genuine Parts Water Pump Outlet Pipe Gasket (Part Number: 12644927) is a replacement gasket intended to seal the water pump outlet pipe for proper coolant containment. Function: Provides a sealing surface between the water pump outlet and pipe to preven ...
MSRP $0.88
$0.53
MSRP $0.88
$0.53
12
Fan Blade GM
GM Description: GM Genuine Parts Fan Blade (Part Number: 84012677) is an OE cooling fan blade intended to move airflow through the radiator and improve engine cooling efficiency. Type: Engine bay fan bladeFunction: Drives airflow across the radiator and condenser to suppo ...
MSRP $283.61
$155.27
MSRP $283.61
$155.27
12
Acdelco™ Fan Blade GM
GM Description: 6.6L diesel. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
13
Engine Cooling Fan Clutch GM
GM Description: GM Genuine Parts Clutch (Part Number: 85588578) is an engine cooling fan clutch assembly designed for heavy‑duty diesel applications to engage/disengage the fan based on thermal demand. Application: Specified for 6.6L diesel 4WD models including Silverad ...
MSRP $667.41
$363.74
MSRP $667.41
$363.74
14
Engine Coolant Fan Lower Shroud GM
GM Description: GM Genuine Parts Engine Coolant Fan Lower Shroud (Part Number: 84082828) is a factory lower shroud that helps contain and direct cooling fan airflow for heavy-duty engine cooling applications. Engineered to GM OE requirements for fit and airflow performanc ...
MSRP $69.92
$47.83
MSRP $69.92
$47.83
14
Engine Cooling Fan Upper Shroud GM
GM Description: GM Genuine Parts Engine Cooling Fan Upper Shroud (Part Number: 84943756) is an upper radiator fan shroud designed to house cooling fans and optimize airflow for heavy-duty engine cooling. Type: Upper engine cooling fan shroudFunction: Positions and protect ...
MSRP $62.25
$42.75
MSRP $62.25
$42.75
14
Fan Shroud GM
GM Description: 6.6L diesel. Silverado, Sierra 2500 HD. Rear. Silverado, Sierra 3500 HD.
MSRP $222.55
$146.22
MSRP $222.55
$146.22