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Diagnostic Aids

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.

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

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