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GMC Sonoma Problems

Check Engine Light and Erratic Gauge Operation on GMC Sonoma

Problem Description and Possible Solution

The electrical contacts in the ignition switch may fail and result in erratic instrument panel gauge operation or illumination of the Check Engine Light. A failed ignition switch will require replacement.

(13 people reported this problem)

GMC Sonoma Vehicles With This Problem

RepairPal Verified
Average mileage: 150,000 (150,000–150,000)
8 model years affected: 1991, 1992, 1993, 1994, more1995, 1996, 1997, 1998
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Brake problem? Or maybe a faulty head gasket cylinder?
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