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 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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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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