2021 GMC Acadia SLFACTORY OEM SERVICE PROCEDURE

Engine Control Module Replacement

WARNING: This page is about a different car, the 2020 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
GM5334650Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
Preliminary Procedure 
Disconnect the negative battery cable. Battery Negative Cable Disconnection and Connection
1 Engine Control Module
WARNING:

Refer to Safety Glasses Warning .

Factory Service Tools

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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.