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

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

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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 problem details
2009 GMC Sierra 1500 130,000 mi,
Checked gas cap and is OK but light is still on
2008 GMC Sierra 1500 60,000 mi,
check engine light continues to come on about 1/2 tank full and code reads loose gas cap