2003 Cadillac Seville STS Repair and Maintenance

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

2003 Cadillac Seville STS Problems

Heating and AC Temperature and Air Delivery Mode Door Actuators May Fail

One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored in the HVAC control module which should assist in diagnoses.

Replace Fuel Filter Every 30,000 to Prevent Fuel Pump Failure

The fuel pump may fail causing the engine to stall and not restart. Our technicians recommend replacing the fuel filter every 30,000 miles to help prevent undue strain on the fuel pump.

Excessive Engine Oil Consumption

Vehicles equipped with the 4.6L engine may develop excessive oil consumption. Please be advised that under optimum driving conditions, using one quart of oil every 2000 miles is acceptable. This Cadillac standard applies to vehicles with less that 50,000 miles. Our technicians tell us that if you experience excessive oil consumption it may be caused by built up on the piston rings which restricts movement, preventing them from wiping all the oil from the cylinder walls. Oil left behind is then burned during the combustion process. There is a special ring cleaning procedure which can help this situation. The GM service bulletin number is #02-06-01-009C.

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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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