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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 137 (Cruise Control System) >> Diagnostic Information and Procedures >> DTC P0703 >> Circuit/System Description

Circuit/System Description

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The body control module (BCM) monitors the stop lamp switch, mounted on the brake pedal. The BCM sends a GMLAN serial data message to the engine control module (ECM) indicating the status of the stop lamp switch.

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