1999 Cadillac Seville STS Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 Cadillac Seville STS
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1999 Cadillac Seville STS ProblemsCheck Engine Light Due to Gas Cap Issue
A Loose or worn gas cap may cause Check Engine Light to illuminate.
The spark plugs should be replaced every 100,000 miles. Our technicians recommend replacing the spark plug wires also at this time.
1999 Cadillac Seville STS QuestionsI plan to replace my Ignition coils and modules, how many will I need to buy? (1 answer)
how many ignition coils do I need to purchase?