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Home >> GMC >> 2011 >> Yukon Base, 5.3 3 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC B1453 >> Circuit/System Description

Circuit/System Description

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The Run, ON, and START Power signals connect the serial data gateway module along with numerous other modules to the vehicle 12-volt system through a fused relay in the fuse block - underhood. This relay is closed by the Body Control Module (BCM) based on the key being in either the RUN or START position.

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