1991 Cadillac Seville STS Repair and Maintenance

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

1991 Cadillac Seville STS Problems

Car Won't Start Because of Anti-Theft System That Uses Raised-Chip Key

Problems with anti-theft systems using the raised-chip key can prevent the car from starting. The wires in the steering column to the ignition lock cylinder tend to break. The key and ignition lock cylinder should be replaced to correct this condition.

High Pressure Power Steering Hose Can Leak Fluid

The high-pressure power steering lines are known to leak.

Powertrain Control Module may Develop Fault

This powertrain control module (PCM) may develop a fault with its electrical ground location at the front of the engine block near the starter motor.

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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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