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Model Year Affected: 1998
A Loose or worn gas cap may cause Check Engine Light to illuminate.
I was told the charcoal canistor is pluged or needs to be cleaned or replaced.
Q&A > Buick > 1997 Buick Riviera
Common Problems > Buick Riviera
Q&A > Buick > 1996 Buick Riviera
Q&A > Buick > 1995 Buick Riviera