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Check Engine Light Due to Gas Cap Issue on GMC Sierra 2500 HD

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: 137,333 (92,000–200,000)
Exhaust & Emissions affected: Gasoline
9 model years affected: 2001, 2002, 2003, 2004, more2005, 2006, 2008, 2009, 2010
12 people reported this problem
Viewing 1 - 2 of 2 comments
Won't take gas at pump correctly. Very slow fill up. Not resolved yet
Worn gas cap, check engine light illuminates and does not resolve itself until cap re-set and several (10ish) run cycles.