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Diagnostic Procedures

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DTC P0650: Malfunction Indicator Light Control Circuit (Steps 1-4)
G00241265Courtesy of GENERAL MOTORS CORP.
Fig 2: DTC P0650: Malfunction Indicator Light Control Circuit (Steps 5-15)
G00241266Courtesy of GENERAL MOTORS CORP.