2021 GMC Terrain SLFACTORY OEM SERVICE PROCEDURE

Removal Procedure

  1. Quarter Lower Rear Trim Panel - Remove - Quarter Lower Rear Trim Panel Replacement (Left Side) , or Quarter Lower Rear Trim Panel Replacement (Right Side)
  2. GM4573150Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Accessory and Liftgate Control Module (2) - Disconnect

  3. GM4573159Courtesy of GENERAL MOTORS COMPANY

    Accessory and Liftgate Control Module (1) Remove

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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