Check Engine Light Due to Gas Cap Issue on GMC Sierra 3500 HD

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

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Average mileage: 53,000 (53,000–53,000)
Exhaust & Emissions affected: Gasoline
4 model years affected: 2007, 2008, 2009, 2010
5 people reported this problem
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problem details
2008 GMC Sierra 3500 HD 53,000 mi,
engine light goes on. the mechanic stated that gmc has problems with the gas cap and spout