2021 Chevrolet Bolt EV LTFACTORY OEM SERVICE PROCEDURE

Communication Interface Module Replacement

WARNING: This page is about a different car, the 2020 Chevrolet Bolt EV. However, it is still accessible from the selected car via links, so may be relevant.
GM4541215Courtesy of GENERAL MOTORS COMPANY
Callout Component Name
Preliminary Procedure 
Communication Interface Module Bracket Replacement 
1 Communication Interface Module

Procedure

  1. Push the [2x] retaining tabs outward and slide the module upward.
  2. Refer to Control Module References for programming and setup information, if required.
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.