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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 914 (Transfer Case - Mp 3023-NQH) >> Diagnostic Information and Procedures >> DTC B0770 >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

A short to ground on the AWD indicator control circuit will cause the AWD indicator to remain on at all times. An open or high resistance will cause the AWD indicator to be inoperative during the 2 second bulb check.

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