GMC
Sierra Denali
16

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

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: 100,950 (80,000–135,000)
8 model years affected: 2002, 2003, 2004, 2005, more2006, 2008, 2009, 2010
16 people reported this problem
Comments
Viewing 1 - 2 of 2 comments
check engine light comes on. tighten gas cap and goes off for awhile. replaced gas cap but still happens.
I get message saying to tighten gas cap, but continue to have the problem.