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Unable To Contact OnStar® Call Center

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Unable To Contact OnStar® Call Center Diagnosis (Steps 1-12)
G01712589Courtesy of GENERAL MOTORS CORP.
Fig 2: Unable To Contact OnStar® Call Center Diagnosis (Steps 13-23)
G01712590Courtesy of GENERAL MOTORS CORP.