2003 Cadillac Seville STS Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2003 Cadillac Seville STS

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2003 Cadillac Seville STS Problems

Check Engine Light on Due to Failure of Secondary Air Injection Pump

Water may be drawn into the secondary air injection (AIR) pump causing the pump to fail and the Check Engine Light to illuminate. Our technicians tell us there is a kit available from General Motors to relocate the air intake for the pump which should prevent future damage from water intrusion.

Check Engine Light Due to Gas Cap Issue

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

Misfire and/or Check Engine Light Due To Failed Ignition Coil

An ignition coil may fail causing one of the cylinders to misfire. Each of the two banks of cylinders has its own coil assembly. If one ignition coil fails the coil assembly for the corresponding cylinder bank must be replaced.

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2003 Cadillac Seville STS Questions

i need a windshield replacement and alternator replacement how much would that cost? (2 answers)

How many camshaft position sensors are there on a 03 cadillac seville sls? (1 answer)

Im getting camshaft codes and misfire codes I already replaced one sensor how can I find out what else is causing the misfire

why does the fuel guage remain on empty? (1 answer)

It was working when I parked it in the garage. One week later when I started it the guage went to full, then went to empty. I filled the tank that day and it remained on empty.

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2003 Cadillac Seville STS Reviews

I own a 1998 and 2003 Cadillac STS, both have had oil leaks and driver's seat heater failure at approximately 85,000 miles. The resealing of the crankcase and oil pan requires removing the transmission. Paid $1,500 each to reseal the engines. The seat heater requires pulling the cover and cushion back and splicing the broken wire feeding into the heating pad. I paid $245 to have a repair shop...
i love this car very fast, but ever seville i see including mine have a tail light out, on mine its not the bulb or the fuse ???
I just bought a 2003 STS and this car is the best car that I have ever owned.

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