Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Power Running Board (PRB) System
The PRB system is comprised of the following:
- RH and LHPRB
- RH and LHPRB end caps (front an back of the PRB)
- RH and LHPRB hinges
- RH and LHPRB motors
- RH and LHPRB connecting rods
- DSM
- RH and LHPRB kick Switches
The PRB motors are on the front hinge of the respective PRB. Torsion bars are connected between the front and rear PRB hinges to keep the PRB movement even and smooth. The PRB motors are serviced as part of the front hinge. All other components are serviced separately.
The PRB system is intended to assist occupants to step into and out of the vehicle. This feature can be set to several different operating modes using the APIM on the instrument panel. The corresponding information is displayed on the message center. The available settings are Mode (Auto, Off, OUT), Approach detection (enable, disable), Kick switch (always work, only when unlock).
The DSM sets Continuous Memory Diagnostic Trouble Codes (CMDTCs) to aid in system diagnostics. The PRB system will reverse PRB direction if there is an object interfering with movement or if there is excessive resistance due to debris or corrosion.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.