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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 985 (Instrument Panel System Displays & Gages) >> Diagnostic Information and Procedures >> Instrument Cluster Inoperative >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Voltage is supplied to the instrument panel cluster (IPC) through the battery voltage circuit and the RUN/CRANK relay voltage circuit. The IPC will operate when the RUN/CRANK relay voltage circuit is commanded on in the RUN/START position.

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