1991 Cadillac Seville STS Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 1991 Cadillac Seville STS

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1991 Cadillac Seville STS Problems

Inspect transmission/fluid every 30,000 miles

You may be able to prevent transmission problems by servicing the transmission and inspecting the fluid every 30,000 miles. If the fluid is dark or burned then the transmission system should be completely flushed.

Replace spark plugs every 30,000 miles

The spark plugs should be replaced every 30,000 miles and the spark plug boots should be checked for hot spots and cracks.

Improper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator

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.

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1991 Cadillac Seville STS Questions

Where is the ABS computer module located for an Allante? (1 answer)

The car is actually a 1991 Cadillac Allante, where is the Controller for the ABS system located and how hard is it to replace?

Losing Oil Problem (1 answer)

I have a 91 Cadillac Seville. This has been a wonderful car and now all of a sudden I am losing oil on a daily basis. I am sure I am now probably out again and now the red warning light came on. What is happening and how much will it cost to repair?

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1991 Cadillac Seville STS Reviews

Had some tranny issues and my back doors no longer open but overall a great running car and I love it!!

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