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.

2003 Pontiac Sunfire AutomaticFACTORY OEM SERVICE PROCEDURE

Removal Procedure

CAUTION: Refer to BATTERY DISCONNECT CAUTION in Cautions and Notices.

Disconnect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE .
Release the body control module (BCM) wire harness retainer from the BCM bracket.
Disconnect the BCM electrical connectors from the BCM.
Release the lock tabs and remove the BCM from the BCM bracket.

Fig 1: Removing BCM From BCM Bracket
Courtesy of GENERAL MOTORS CORP.
Remove the BCM bracket nuts (2) if required.
Remove the BCM bracket (1) as an assembly if required.

Fig 2: Removing BCM Bracket
Courtesy of GENERAL MOTORS CORP.

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.