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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1320 (Mirror System) >> Diagnostic Information and Procedures >> DTC B1640 >> Conditions for Setting the DTC >> B1640 02

B1640 02

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

A short to ground is detected on the mirror heating element control circuit while the heated mirrors are active.

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