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Diagnostic Aids

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Refer to EXTERIOR LIGHTING SYSTEMS DESCRIPTION AND OPERATION in order to avoid a misdiagnosis.

For an intermittent condition, refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS .

Fig 1: DTC P1574
G01577562Courtesy of GENERAL MOTORS CORP.
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