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 Problems

Check Engine Light Due to Gas Cap Issue

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

Engine Overheating Due to Leaking Headgasket

Overheating of the engine may cause the cylinder head to expand, severely straining the head bolts and damaging the threads in the engine block. This commonly results in a blown head gasket. Our technicians tell us the engine block threads must be repaired before the cylinder head is reinstalled.

Coolant Leaks From Water Pump and Radiator

The water pump and/or the plastic side tanks on the radiator may leak causing a loss of coolant. The engine may overheat due to coolant loss. Continued coolant loss after external leaks have been repaired could indicate a blown head gasket.

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1999 Cadillac Seville STS Reviews

Purchased in 1999, original owner, I only drive it occasionally and have around 71k miles on it now. Only 1 major issue with the vehicle - a nagging vibration at 65mph caused by either axle or something in the suspension up front. Original tires, and replacement tires as well as rims have been high speed road force balanced twice but vibration continues. Replacing the axle will be next, somet...
my car has 251,000 miles and is still going strong--put used struts & windshield in it in the last 3 years--5000 rpm at least once a week for a couple minutes to keep that northstar from useing oil works--use a quart every 3k---don't drive a northstar like a grandma and it will treat you right!---love this car---
I own a 1999 Seville STS with 193k miles. The only issues on the interior are: Front passenger door lock switch will only un-lock, not lock. Front passenger window regulator failed, needs replaced. Brake light circuit open, switch needs alignment. Only mechanical problems are: Right rear air ride strut has air leak, causes compressor to run often. Does not affect driving performance...

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