1990 Cadillac DeVille Sedan deVille review from North America

I purchased this car knowing it needed major repairs as the previous owner had neglected it mechanically. The head gaskets were blown, and it ran very poorly. After a tune-up, having a valve job done, replacing the head gaskets, water pump, thermostat, serpentine belt, and radiator it still had a miss. It turned out the computer was sending a misfire around the engine. After having the fuel injectors removed and cleaned and replacing the ECM the car runs great! Since then I have replaced the catalytic converter and driver's door window motor. To top all this off the car was totaled out in 1998. The owner at that time hit a cow with the car and it was rebuilt. I have not spent a tremendous amount of money on this car as I did a lot of the labor myself. If you want a car that is a trooper, look at the 88-93 Cadillacs (4.5 or 4.9 V8). 87 and 88 models have the same appearance, but the 87 is the HT4100 that is prone to problems. Save yourself big money and if the car is overheating- stop the car and turn it off immediately!

This car is a fantastic car. Very comfortable. If at all possible get a GM shop manual. It will go into much more detail than the generic repair books. Also check with O'Reilly for parts. They are much cheaper than the dealer and almost always have a lifetime warranty. My brand new water pump with lifetime warranty cost me $59 and will do as well or better than the GM pump.