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.

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HOMESERVICE MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 16 (FRAME AND UNDERBODY)REPAIR INSTRUCTIONSASSIST STEP MOTOR REPLACEMENT

2009 Chevrolet Tahoe Base, 4.8 C

Assist Step Motor Replacement

2009 Chevrolet Tahoe Base, 4.8 CSECTION Assist Step Motor Replacement

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Assist Step Motor, Motor Bolts, Motor Wedge & Wedge Bolt

Courtesy of GENERAL MOTORS CORP.

Assist Step Motor Replacement

Callout	Component Name
Preliminary Procedures Deploy the power assist step. Disconnect any electrical connectors.
1	Assist Step Motor Wedge Bolt NOTE: Refer to Fastener Notice . Tighten: 8 N.m (71 lb in)
2	Assist Step motor Wedge
3	Assist Step Motor Bolts (Qty: 3) Tighten: 12 N.m (9 lb ft)
4	Assist Step Motor IMPORTANT: Make sure the flat on the motor is parallel to the floor before installing. All new motors should be shipped with motor flat in the correct position. As the motor is installed shake the board up and down gently to make sure the wedge and flat seat together correctly or unwanted noise could result. Tip: Once the installation of the new motor is completed the assist step must be cycled once for the module to learn the positioning.

RENDER: 1.0x

NO RELATED

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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.