Running Board for 2020 GMC Sierra 1500
1. Step Bar Assembly 
2. 6-Inch Rectangular Wheel-to-Wheel Assist 
3. Molded Assist Steps, Black 
4. Assist Steps, 6" Rectangular, Black 
5. Molded Assist Steps, Black, 4-Inch Round 
6. Right 
7. Left 
8. Work Step Assist Steps - Black - Crew Cab 
9. Assist Steps, Work Steps, Black 
10. Molded Assist Steps - Black - Double Cab 
11. Sport Step Assist Steps 
12. Sport Assist Steps, Black with Sierra Script 13. Step Bar Assembly Rear Cap No.
Part # / Description / Price
Price
1
Passenger Side Assist Step 
GM
GM Positions: Right
Description: The GM Genuine OEM Passenger Side Assist Step (MPN: 84835383) is a power retractable running board designed to enhance vehicle access and egress on select crew cab GM trucks. This authentic General Motors part delivers reliable functionality and safety com ...
MSRP $1,654.12
$1,086.14
MSRP $1,654.12
$1,086.14
1
Step Bar Assembly GM
GM Positions: Left
Description: Genuine GM OEM Step Bar Assembly (MPN: 85659271) is a crew cab power retractable step bar designed for enhanced vehicle entry and exit functionality on select GM vehicles. This original equipment manufacturer component delivers reliable performance and sea ...
$945.07
$945.07
2
Motor GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: The GM OEM Motor (MPN: 85659273) is a genuine General Motors replacement motor engineered for crew cab applications with power retractable functionality. This authentic factory-original part delivers reliable performance for compatible GM trucks and SUVs r ...
$667.98
$667.98
2
Motor GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: # Product Description
This Genuine GM OEM Motor (MPN: 85659274) is engineered for crew cab models with power retractable functionality, delivering reliable performance for select GM vehicles. As an authentic General Motors factory part, this motor ensures ...
$667.98
$667.98
3
Driver Side Assist Step Front Finish Cap GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: The GM OEM Driver Side Assist Step Front Finish Cap (MPN: 84266747) is an authentic General Motors replacement part engineered for crew cab power retractable assist steps. This genuine GM front finish cap delivers a polished, factory-quality appearance whi ...
MSRP $60.84
$41.74
MSRP $60.84
$41.74
3
Step Bar Front Cap GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Genuine GM OEM Step Bar Front Cap (MPN: 84266748) is a factory replacement component designed for crew cab power retractable step bars on select GM vehicles. This OEM part maintains authentic fitment and performance for your truck's retractable running boa ...
MSRP $60.84
$41.74
MSRP $60.84
$41.74
4
Assist Step Front Extension GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: # Product Description
The GM Assist Step Front Extension (MPN: 84409838) is a genuine OEM power retractable running board designed for crew cab trucks, making entry and exit safer and more convenient. This authentic General Motors part delivers factory-qu ...
MSRP $229.08
$151.11
MSRP $229.08
$151.11
4
Running Board Reinforcement Bracket GM
GM Positions: Rear
Description: The GM Running Board Reinforcement Bracket (MPN: 23242812) is a genuine OEM collision repair part engineered to properly align and secure power retractable running boards on crew cab pickup trucks. This authentic General Motors part meets factory specifica ...
MSRP $13.03
$9.36
MSRP $13.03
$9.36
4
Driver Side Assist Step Front Extension GM
GM Positions: Front left
Description: The Driver Side Assist Step Front Extension (MPN: 23321126) is a genuine GM OEM power retractable running board designed for crew cab pickup trucks and SUVs. This factory-engineered component provides safe, convenient step-down access to your vehicle's cab ...
MSRP $245.38
$161.86
MSRP $245.38
$161.86
4
Passenger Side Assist Step Front Extension GM
GM Positions: Front right
Description: The Passenger Side Assist Step Front Extension (MPN: 23321127) is a genuine GM OEM power retractable running board designed for crew cab trucks to provide convenient vehicle entry and exit. This manufacturer-approved component ensures precise fit and relia ...
MSRP $239.85
$158.22
MSRP $239.85
$158.22
4
Driver Side Assist Step Front Extension GM
GM Positions: Rear left
Description: The Driver Side Assist Step Front Extension (MPN: 84613787) is a genuine GM OEM part engineered for crew cab trucks with power retractable stepping functionality. This authentic General Motors component provides safe, motorized access to your truck bed and ...
MSRP $230.66
$152.15
MSRP $230.66
$152.15
4
Rear Extension GM
GM Positions: Rear right
Description: Genuine GM OEM Rear Extension (MPN: 84613788) is a factory-original component designed for crew cab trucks with power retractable tonneau cover systems. This authentic General Motors part ensures proper alignment and functionality of your truck bed cover m ...
MSRP $232.25
$153.20
MSRP $232.25
$153.20
5
Front Bracket Insulator GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: # Front Bracket Insulator - GM OEM Part 84722532
The Front Bracket Insulator (MPN: 84722532) is a genuine GM OEM component designed for crew cab models with power retractable features. This essential bracket insulator provides structural support and vibra ...
$11.80
$11.80
11
Driver Side Assist Step Switch GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: # Driver Side Assist Step Switch - GM OEM Part 84266749
The GM OEM Driver Side Assist Step Switch (MPN: 84266749) is a genuine power retractable step control component engineered for crew cab pickup trucks and SUVs. This authentic General Motors part mana ...
MSRP $131.41
$87.71
MSRP $131.41
$87.71
11
Passenger Side Assist Step Switch GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: The Passenger Side Assist Step Switch (MPN: 84266750) is a genuine GM OEM component engineered for crew cab trucks with power retractable running boards. This original equipment manufacturer switch controls the deployment and retraction of your vehicle's a ...
MSRP $131.41
$87.71
MSRP $131.41
$87.71
12
Wire GM
GM Positions: Left
Notes: PARTS: Part included with step bar assembly.
Description: Genuine GM OEM Wire (MPN: 84266751) is engineered for crew cab models featuring power retractable systems, delivering reliable electrical connectivity for your truck's advanced cab functionality. This original equipment manufacturer part ensures proper ope ...
MSRP $157.92
$105.40
MSRP $157.92
$105.40
12
Wire GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: The GM OEM wire assembly MPN 84266752 is engineered for power retractable crew cab systems in select General Motors trucks and SUVs. This genuine wire harness delivers reliable electrical connectivity to motorized cab roof mechanisms, ensuring smooth opera ...
MSRP $157.92
$105.40
MSRP $157.92
$105.40
13
Module GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: Genuine GM OEM Power Retractable Step Module (MPN: 84835967) for crew cab trucks with right side installation. This authentic General Motors component delivers reliable functionality for vehicles equipped with power retractable running boards. Buy OEM part ...
MSRP $588.04
$386.12
MSRP $588.04
$386.12
14
Passenger Side Running Board Mounting Bracket GM
GM Positions: Right
Notes: PARTS: Part included with step bar assembly.
Description: The GM OEM Passenger Side Running Board Mounting Bracket (MPN: 84266744) is engineered to properly align and secure your vehicle's assist step, ensuring safe and reliable operation. This genuine General Motors part meets factory specifications and is ideal ...
MSRP $115.49
$77.08
MSRP $115.49
$77.08