Check Engine Light Due to Gas Cap Issue on GMC 3500 Pickup

Problem Description and Possible Solution

Illumination of the Check Engine Light can be caused by a loose or worn gas cap.

Problem Data
RepairPal Verified
Average mileage: (–)
Exhaust & Emissions affected: Gasoline
5 model years affected: 1996, 1997, 1998, 1999, more2000
5 people reported this problem
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