Check Engine Light Due to Gas Cap Issue on Cadillac Seville SLS

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

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Average mileage: 108,666 (68,000–143,000)
9 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002, 2003, 2004
13 people reported this problem
2 people shared problem details
Was getting a check gas cap message ans subsequent check engine light, Applied some Vaseline to the oring on the gas cap works for a short time, but a new cap is needed to fix.
Check Engine light came on, fuel leak detected, check gas cap came on around a week later, changed and services engine soon turned off.
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