Radiator & Components for 2026 GMC Sierra 2500 HD
1. Radiator 
2. Auxiliary Radiator 
3. Lower Baffle Bolt 
4. Lower Baffle Bolt 
5. Hoses 
6. Lower 
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
1
Engine Radiator 
GM
GM Description: Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. Primary. 6.6L diesel, engine cooling.
MSRP $879.94
$564.93
MSRP $879.94
$564.93
2
Passenger Side Radiator Upper Bracket GM
GM Positions: Right
Description: 6.6L gas. 6.6L diesel, engine cooling. Helps align and secure your vehicle's radiator mount
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
Collision parts are designed to help promote proper and safe repair
MSRP $20.58
$16.12
MSRP $20.58
$16.12
2
Driver Side Radiator Upper Bracket GM
GM Positions: Left
Description: 6.6L gas. 6.6L diesel, engine cooling. Helps align and secure your vehicle's radiator mount
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
Collision parts are designed to help promote proper and safe repair
MSRP $20.58
$16.12
MSRP $20.58
$16.12
2
Driver Side Radiator Lower Bracket GM
GM Positions: Left
Description: Helps align and secure your vehicle's radiator mount
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
Collision parts are designed to help promote proper and safe repair
MSRP $228.25
$158.13
MSRP $228.25
$158.13
2
Passenger Side Radiator Lower Bracket GM
GM Positions: Right
Description: Helps align and secure your vehicle's radiator mount
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Original equipment parts are designed to work with your GM vehicle safety systems -- aftermarket replacement parts may not meet the same OE safety regulations, depending on the part type
Collision parts are designed to help promote proper and safe repair
MSRP $228.25
$158.13
MSRP $228.25
$158.13
3
Radiator Upper Insulator GM
GM Positions: Left
Description: 6.6L gas. 6.6L diesel, engine cooling, upper. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $9.01
$7.03
MSRP $9.01
$7.03
4
Radiator Lower Mount GM
GM Positions: Left
Notes: PARTS: Part included with radiator.
Description: 6.6L diesel, 2017-19. 6.6L diesel, engine cooling, center. 6.6L turbo diesel. 6.6L diesel 2015-16. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $9.01
$7.03
MSRP $9.01
$7.03
5
Radiator Insulator GM
GM Positions: Left
Notes: PARTS: Part included with radiator.
Description: 6.6L diesel, engine cooling, lower.
MSRP $16.56
$12.92
MSRP $16.56
$12.92
6
Radiator Drain Petcock GM
GM Notes: PARTS: Part included with radiator.
Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $24.48
$19.10
MSRP $24.48
$19.10
7
Radiator Inlet Hose GM
GM Description: Manufactured to GM OE specification for fit, form, and function
MSRP $37.85
$29.52
MSRP $37.85
$29.52
9
Radiator Inlet Hose Clamp GM
GM Description: 6.6L diesel, engine cooling, rear. Easy to install or remove
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $34.42
$26.85
MSRP $34.42
$26.85
10
Radiator Coolant Hose GM
GM Description: Primary Radiator. Silverado, Sierra 2500 HD. Silverado, Sierra 3500 HD. 6.6L diesel, engine cooling.
MSRP $175.56
$121.13
MSRP $175.56
$121.13
11
Radiator Hose Clamp GM
GM Notes: PARTS: Part included with lower hose.
Description: 2.8L. Easy to install or remove
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $8.70
$6.79
MSRP $8.70
$6.79
12
Multi-Purpose Clamp GM
GM Notes: PARTS: Part included with lower hose.
Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $6.64
$4.91
MSRP $6.64
$4.91
12
Radiator Outlet Hose Clamp GM
GM Description: Helps prevent leaks
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $7.50
$5.86
MSRP $7.50
$5.86
13
Expansion Tank GM
GM Description: Silverado, Sierra 2500 HD. 6.6L diesel, engine cooling. Silverado, Sierra 3500 HD.
MSRP $98.07
$70.61
MSRP $98.07
$70.61
15
MSRP $24.80
$19.34
15
Engine Coolant Air Bleed Pipe GM
GM Description: 6.6L diesel, engine cooling. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $26.42
$19.58
MSRP $26.42
$19.58
15
MSRP $29.30
$22.85
16
Multi-Purpose Clamp GM
GM Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $62.60
$40.70
MSRP $62.60
$40.70
17
Multi-Purpose Clamp GM
GM Description: 6.6L diesel, engine cooling, large. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $7.14
$5.29
MSRP $7.14
$5.29
20
MSRP $149.95
$103.47
20
Outlet Hose GM
GM Positions: Right
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
$136.24
MSRP $197.46
$136.24
20
Inlet Hose GM
GM Positions: Left
Description: Silverado, Sierra 2500 HD. Inlet. Silverado, Sierra 3500 HD. Auxiliary Radiator. Emission Reduction Fluid Injector Cooling. 6.6L diesel, fuel cooling, to 09/19/2024.
MSRP $133.53
$92.13
MSRP $133.53
$92.13