Check Engine Light Due to Gas Cap Issue on Buick LaCrosse

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

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Average mileage: 72,496 (19,620–128,000)
1 model year affected: 2005
6 people reported this problem
3 people shared problem details
2005 Buick LaCrosse60,000
Check engine light csame on, pulled trouble code it was stating gas cap problem replaced cap. turned out to be a bad sensor in the gas tank.
2005 Buick LaCrosse80,000
In shop now for this and a power steering issue (I don't have details yet)
light is coming on occasionally even though cap is tight.
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