Frame for 2021 GMC Sierra 3500 HD
1. Step Bar Assembly 
2. Outer Rail 
3. Frame Assembly 
4. Inner Center Pillar 
5. Mount Cushion 
6. Body A-Pillar Bracket 
7. Body B-Pillar Bracket 
8. Windshield Pillar Trim 
9. Uniside Assembly 
10. Cowl Side Panel Seal 
11. Body A-Pillar 
12. Uniside Assembly 
13. Body A-Pillar Trim Panel 
14. Inner Lock Pillar 
15. Inner Windshield Pillar 
16. Rear 
17. Windshield Pillar Trim 
18. Windshield Pillar Trim 
19. Left 
20. Side Cover 
21. Cowl Grille 
22. Right 
23. Right 
24. Right 
25. Frame Assembly 
26. Body A-Pillar Trim Panel 
27. Body A-Pillar Trim Panel 
28. Inner Lock Pillar 
29. Inner Center Pillar 
30. Step Bar Assembly 
31. Front 
32. Fender 
33. Right 
34. Right 
35. Right 
36. Uniside Assembly 
37. Right 
38. Floor Extension 
39. Extension Panel 
40. Sill Panel 41. Body C-Pillar Trim Panel 
GM Outer Rail, Left
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Outer Rail, Right
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Outer Rail Bracket, Left
Front fender. Helps align and secure your vehicle's fender This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors . Collision parts are designed to help promote proper and safe repair
GM Outer Rail Bracket, Left
Rear fender. Helps align and secure your vehicle's fender This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors . Collision parts are designed to help promote proper and safe repair
GM Outer Rail Bracket, Right
Rear fender. Helps align and secure your vehicle's fender This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors . Collision parts are designed to help promote proper and safe repair
GM Outer Rail Bracket, Left
Support strut. Helps align and secure your vehicle's hood strut This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors . Collision parts are designed to help promote proper and safe repair
GM Outer Rail Bracket, Right
Support strut. Helps align and secure your vehicle's hood strut This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors . Collision parts are designed to help promote proper and safe repair
GM Bumper Bracket, Left
Secures your vehicle's fascia to its body This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Bumper Bracket, Right
Secures your vehicle's fascia to its body This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Rail Extension, Right
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Rail Extension Bracket, Left
Lh only. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Inner Rail Bracket, Right
Rh only. Right side only. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Reinforcement
Battery tray, front. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Reinforcement
Battery tray, rear. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Reinforcement, Left
Inner rail, #1. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Reinforcement, Right
Inner rail, #1. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Reinforcement, Left
Inner rail, #2. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Reinforcement, Right
Inner rail, #2. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Reinforcement, Left
Inner rail, #3. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Reinforcement, Right
Inner rail, #3. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Frame Side Member Reinforcement, Front right inner
Inner rail, #4. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Frame Side Member Reinforcement, Front left inner
Inner rail, #5. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
GM Frame Side Member Reinforcement, Front right inner
Inner rail, #5. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors