Check Engine Light Due to Gas Cap Issue on GMC Sierra 1500

Problem Description and Possible Solution

A Loose or worn gas cap may cause Check Engine Light to illuminate.

Problem Data
RepairPal Verified
Average mileage: 75,250 (42,000–130,000)
2 model years affected: 2008, 2009
9 people reported this problem
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Viewing 1 - 2 of 2 comments
check engine light continues to come on about 1/2 tank full and code reads loose gas cap
Checked gas cap and is OK but light is still on