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 No.
Part # / Description / Price
Price
1
$1,216.39
1
$1,400.71
1
$1,210.86
1
$1,160.87
2
Driver Side Assist Step 
GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Assists with access into and out of your vehicle
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
MSRP $1,247.34
$864.12
MSRP $1,247.34
$864.12
2
Step Bar GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable, chrome.
MSRP $1,247.34
$864.12
MSRP $1,247.34
$864.12
2
Driver Side Assist Step GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Assists with access into and out of your vehicle
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
MSRP $369.10
$255.70
MSRP $369.10
$255.70
2
Step Bar GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable, black.
MSRP $369.10
$255.70
MSRP $369.10
$255.70
2
Step Bar Assembly GM
GM Description: Crew cab, round type, black. Step up convenience and style with these highly durable and capable Chevy Accessories Truck Assist Steps, also known as running boards or side steps. Designed and engineered specifically to fit your vehicle, these sturdy steps ...
MSRP $850.00
$733.13
MSRP $850.00
$733.13
2
Running Board Step GM
GM Description: Make it easier to get into and out of your vehicle with these sturdy Chevrolet Accessories Assist Steps. These Crew Cab 4-Inch Round Assist Steps, also known as truck side steps, feature a traction pad with molded plastic grooves to help provide more stabl ...
MSRP $845.00
$728.81
MSRP $845.00
$728.81
2
Running Board Step GM
GM Notes: Double Cab
Description: Make it easier to get into and out of your vehicle with these sturdy Chevrolet Accessories Assist Steps. They include mounting hardware and a traction pad with molded plastic grooves for more stable footing. Make it easier to get into and out of your vehic ...
MSRP $850.00
$733.13
MSRP $850.00
$733.13
2
4-Inch Round Assist Steps, Chrome GM
GM Notes: Double Cab
Description: Step up convenience and style with these highly durable and capable Chevy Accessories Truck Assist Steps, also known as running boards or side steps. Designed and engineered specifically to fit your vehicle, these sturdy steps feature a textured surface to ...
MSRP $695.00
$599.44
MSRP $695.00
$599.44
2
Running Board Step GM
GM Notes: Regular Cab
Description: Make it easier to get into and out of your vehicle with these sturdy Chevrolet Accessories Assist Steps. They include mounting hardware and a traction pad with molded plastic grooves for more stable footing. These Regular Cab 6-Inch Rectangular Assist Step ...
MSRP $695.00
$599.44
MSRP $695.00
$599.44
2
6-Inch Rectangular Assist Steps, Chrome GM
GM Description: Make it easier to get into and out of your vehicle with these sturdy Chevrolet Accessories Assist Steps. These Crew Cab 6-Inch Rectangular Assist Steps, also known as truck side steps, feature a traction pad with molded plastic grooves to help provide more ...
MSRP $850.00
$733.13
MSRP $850.00
$733.13
2
Running Board Step GM
GM Description: Make it easier to get into and out of your vehicle with these sturdy GMC Accessories Assist Steps. They include mounting hardware and a traction pad with molded plastic grooves for more stable footing. Make it easier to get into and out of your vehicle with these sturdy Chevrolet Accessories Assist Steps.
MSRP $850.00
$733.13
MSRP $850.00
$733.13
2
6-Inch Rectangular Assist Steps, Black GM
GM Description: Step up convenience and style with these highly durable and capable Chevy Accessories Truck Assist Steps, also known as running boards or side steps. Designed and engineered specifically to fit your vehicle, these sturdy steps feature a textured surface to ...
MSRP $850.00
$733.13
MSRP $850.00
$733.13
2
Running Board Step GM
GM Description: Make it easier to get into and out of your vehicle with these sturdy Chevrolet Accessories Assist Steps. They include mounting hardware and a traction pad with molded plastic grooves for more stable footing. These Regular Cab 6-Inch Rectangular Assist Step ...
MSRP $750.00
$646.88
MSRP $750.00
$646.88
2
Running Board Step GM
GM Description: Make it easier to get into and out of your vehicle with these sturdy Chevrolet Accessories Assist Steps. Includes all mounting hardware. Parked over a hole or a puddle? No problem with these Assist Steps. They make getting in and out of your vehicle much e ...
MSRP $455.00
$392.44
MSRP $455.00
$392.44
2
Running Board Step GM
GM Description: Make it easier to get into and out of your vehicle with these sturdy Chevrolet Accessories Assist Steps. They include mounting hardware and a traction pad with molded plastic grooves for more stable footing. Parked over a hole or a puddle? No problem with ...
MSRP $495.00
$426.94
MSRP $495.00
$426.94
2
Running Board Step GM
GM Description: Make it easier to get into and out of your vehicle with these sturdy Chevrolet Accessories Assist Steps. These Crew Cab Work Step Assist Steps, also known as truck side steps, feature a traction pad with molded plastic grooves to help provide more stable f ...
MSRP $525.00
$452.81
MSRP $525.00
$452.81
2
Running Board Step GM
GM Description: Make it easier to get into and out of your vehicle with these sturdy GMC Accessories Assist Steps. These Crew Cab Sport Step Assist Steps, also known as truck side steps, feature a traction pad with molded plastic grooves to help provide more stable footing. Includes all mounting hardware. Parked over a hole or a puddle? No problem with these Assist Steps. They make getting in and out of your vehicle much easier, plus they add a customized look. You get function and style with this accessory.
MSRP $1,095.00
$944.44
MSRP $1,095.00
$944.44
3
Driver Side Assist Step Front Finish Cap GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Installed in your vehicle's assist step for a finished appearance
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
MSRP $17.38
$13.61
MSRP $17.38
$13.61
3
Passenger Side Assist Step Front Finish Cap GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Installed in your vehicle's assist step for a finished appearance
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
MSRP $17.38
$13.61
MSRP $17.38
$13.61
3
Driver Side Assist Step Front Finish Cap GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Installed in your vehicle's assist step for a finished appearance
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
MSRP $17.66
$13.83
MSRP $17.66
$13.83
3
Passenger Side Assist Step Front Finish Cap GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Installed in your vehicle's assist step for a finished appearance
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
MSRP $17.66
$13.83
MSRP $17.66
$13.83
3
Assist Step Front Finish Cap GM
GM Positions: Front left
Description: Regular cab, oval type. Crew cab oval type. Double cab oval type. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $62.91
$47.38
MSRP $62.91
$47.38
3
Assist Step Front Finish Cap GM
GM Positions: Front right
Description: Regular cab, oval type. Crew cab oval type. Double cab oval type. Installed in your vehicle's assist step for a finished appearance
For proper installation, locate your nearest GM dealer, independent service center, or body shop
Precise fit for ease of installation
MSRP $62.91
$47.38
MSRP $62.91
$47.38
3
Assist Step Finish Cap GM
GM Positions: Front left
Description: Crew cab, work step. Double cab, work step. Crew cab black assist. Double cab black assist. Installed in your vehicle's assist step for a finished appearance
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
MSRP $51.44
$38.74
MSRP $51.44
$38.74
3
Assist Step Finish Cap GM
GM Positions: Front right
Description: Crew cab, work step. Double cab, work step. Regular cab, black assist. Crew cab black assist. Double cab black assist. Installed in your vehicle's assist step for a finished appearance
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
MSRP $50.55
$38.06
MSRP $50.55
$38.06
3
Passenger Side Assist Step Front Finish Cap GM
GM Positions: Rear right
Description: Installed in your vehicle's assist step for a finished appearance
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
MSRP $17.38
$13.61
MSRP $17.38
$13.61
3
Passenger Side Assist Step Front Finish Cap GM
GM Positions: Rear right
Description: Installed in your vehicle's assist step for a finished appearance
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
MSRP $17.66
$13.83
MSRP $17.66
$13.83
4
Driver Side Assist Step Front Finish Cap GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Installed in your vehicle's assist step for a finished appearance
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
MSRP $17.38
$13.61
MSRP $17.38
$13.61
4
Driver Side Assist Step Front Finish Cap GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Installed in your vehicle's assist step for a finished appearance
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
MSRP $17.66
$13.83
MSRP $17.66
$13.83
5
Step Bar Plate GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
MSRP $10.39
$8.14
MSRP $10.39
$8.14
6
Motor GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
$307.66
$307.66
6
Passenger Side Assist Step Motor GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
$321.26
$321.26
7
Assist Step Shield GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $8.12
$6.36
MSRP $8.12
$6.36
8
Driver Side Assist Step Shield GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $34.94
$26.31
MSRP $34.94
$26.31
8
Passenger Side Assist Step Shield GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $34.94
$26.31
MSRP $34.94
$26.31
9
Rod GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
MSRP $33.33
$25.10
MSRP $33.33
$25.10
10
Rear Bracket GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
$137.95
$137.95
10
Rear Bracket GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
$141.42
$141.42
11
Driver Side Assist Step Insert GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
MSRP $115.30
$83.35
MSRP $115.30
$83.35
11
F Insert GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
$118.38
$118.38
12
Lamp GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
$110.18
$110.18
12
Lamp GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
$110.18
$110.18
13
Wire GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
MSRP $23.12
$18.11
MSRP $23.12
$18.11
13
Wire GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Crew cab, power retractable.
MSRP $35.97
$27.09
MSRP $35.97
$27.09
