Cooling System for 2025 Chevrolet Silverado 2500 HD
1. ACDelcoâ„¢ Auxiliary Radiator 
2. Reservoir Cap 
3. Cap 
4. Cap 
5. Cap 
6. Cap 
7. Cap 
8. Reservoir Cap 
9. Reservoir Cap 
10. Reservoir Cap 
11. Cap 
12. Cap 
13. Cap 
14. Cap 
15. Cap 
16. Cap 
17. Cap 
18. Cap 
19. Cap 
20. Cap 
21. Cap 
22. Cap 
23. Cap 
24. Cap 
25. Cap 
26. Cap 
27. Cap 
28. Cap 
29. Reservoir Cap 
30. Cap 
31. Cap 
32. Cap 
33. Cap 
34. Reservoir Cap 
35. Cap 
36. Reservoir Cap 
37. Reservoir Cap 
38. Reservoir Cap 
39. Reservoir Cap 
40. Reservoir Cap 
41. Cap 
42. Reservoir Cap 
43. Cap 
44. Cap 
45. Reservoir Cap 
46. Cap 
47. Cap 
48. Cap 
49. Reservoir Cap 
50. Reservoir Cap No.
Part # / Description / Price
Price
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
$87.71
MSRP $133.53
$87.71
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
$129.12
MSRP $197.46
$129.12
N/A
Shutter GM
GM Description: GM Genuine Parts Shutter (Part Number: 85021605) is an active shutter assembly for the front bumper area used on vehicles equipped with active grille shutters to manage airflow and thermal performance.Type: Active Shutter / Grille ShutterFunction: Opens an ...
$199.96
$199.96
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
$207.47
MSRP $316.67
$207.47
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
$19.09
MSRP $24.48
$19.09
N/A
By-Pass Pipe GM
GM Description: 6.6L diesel. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
MSRP $80.00
$46.75
MSRP $80.00
$46.75
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
$83.86
MSRP $134.35
$83.86
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
$569.14
MSRP $879.94
$569.14
2
Radiator Inlet Hose GM
GM Description: Manufactured to GM OE specification for fit, form, and function
MSRP $37.85
$26.54
MSRP $37.85
$26.54
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
$114.80
MSRP $175.56
$114.80
5
Expansion Tank GM
GM Description: Silverado, Sierra 2500 HD. 6.6L diesel, engine cooling. Silverado, Sierra 3500 HD.
MSRP $98.07
$64.43
MSRP $98.07
$64.43
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
$11.97
MSRP $17.12
$11.97
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
$11.69
MSRP $16.72
$11.69
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
$9.79
MSRP $14.00
$9.79
8
Thermostat Housing GM
GM Description: 6.6L diesel. Silverado, sierra. 6.6l. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD.
$213.48
$213.48
9
Water Outlet GM
GM Description: Manufactured to GM OE specification for fit, form, and function
MSRP $91.26
$53.33
MSRP $91.26
$53.33
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
$161.71
MSRP $296.72
$161.71
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
$0.66
MSRP $0.88
$0.66
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
$6.14
MSRP $8.20
$6.14
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
$154.55
MSRP $283.61
$154.55
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
$298.72
MSRP $667.41
$298.72
13
Clutch GM
GM Description: GM Genuine Parts Fan Blade Clutch (Part Number: 84963656) is a viscous fan clutch assembly specified for heavy-duty Silverado and Sierra 2500/3500 HD 6.6L diesel applications. Controls fan engagement to regulate engine cooling at varying operating conditio ...
MSRP $627.66
$294.15
MSRP $627.66
$294.15
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
$49.04
MSRP $69.92
$49.04
14
Fan Shroud GM
GM Description: 6.6L diesel. Silverado, Sierra 2500 HD. Rear. Silverado, Sierra 3500 HD.
MSRP $222.55
$145.54
MSRP $222.55
$145.54
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
$43.83
MSRP $62.25
$43.83