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Service Bulletin: Brake Light Malfunction

This technical service bulletin addresses an intermittent issue where brake lights on specific General Motors vehicles may not function correctly. The problem is linked to fretting corrosion within the Body Control Module (BCM) C2 connector, potentially causing the brake lights to fail, affecting cruise control operation, and triggering diagnostic trouble codes (DTCs) such as C0161, C0277, and C0131.

The affected models include various model years of the Chevrolet Malibu, Malibu Maxx, Chevrolet Malibu Classic, Pontiac G6, and Saturn Aura. The bulletin provides a detailed correction procedure for technicians, emphasizing that replacement of the BCM is not required.

The recommended repair involves disconnecting the BCM C2 connector, applying a specific dielectric lubricant to the pins to prevent and correct fretting corrosion, and then reconnecting the connector. The procedure also includes verification steps using diagnostic tools like the Tech 2® to check brake pedal position sensor (BPPS) voltage and confirm proper brake light operation.

Key steps include:

The document also provides warranty information for repairs performed under warranty, including labor operation codes and time allowances. It clarifies that these bulletins are intended for professional technicians and not for DIY repairs.

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