Removal Procedure

Prepare the engine control module for replacement. Refer to Control Module References .
Open the hood.
Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
Remove the engine sight shield. Refer to Engine Sight Shield Replacement .
Unclip the 2 wiring harness clips (2) from the bracket.

Fig 1: Wiring Harness Clips
Courtesy of GENERAL MOTORS COMPANY

CAUTION: In order to prevent any possible electrostatic discharge damage to the ECM, do not touch the connector pins.
Unlock the 2 wiring harness plugs (1) from the engine control module and hang it aside.
Remove the engine control module (1).

Fig 2: Engine Control Module
Courtesy of GENERAL MOTORS COMPANY
- Unlock the holding clip (2) use a screwdriver.
- Remove the engine control module (1) out of the bracket.
Remove the engine control module insulator (1) from the engine control module bracket (2) in arrow direction.

Fig 3: Engine Control Module Insulator
Courtesy of GENERAL MOTORS COMPANY

Unclip the retainer with a screwdriver.
Remove the engine control module (1) from the engine control module bracket in arrow direction.

Fig 4: Engine Control Module
Courtesy of GENERAL MOTORS COMPANY

Unclip the retainer (2) with a screwdriver.