1990 Cadillac DeVille Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1990 Cadillac DeVille
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1990 Cadillac DeVille ProblemsImproper HVAC Temperature and/or Air Delivery Due to Failed Mode Door Actuator
One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator may fail. This can result in incorrect air delivery or temperature. If this occurs, fault code(s) stored in the HVAC control module should be available to assist with diagnoses.
Problems with the 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 the key and ignition lock cylinder must be replaced to correct this condition.
One or more of the power window regulators (one in each door) may fail causing the window to fall into the door and not roll up.
1990 Cadillac DeVille Questionsengine bay was washed now car idles to rough to be driven (1 answer)
car is getting fuel, spark, air,etc. what could have gotten wet to do this.? Seven different mechanics said they don't know what it is wrong with it.
It's a 1986 Cadillac deville, the fuel indicator was blinking and Empty sign . I replaced a fuse now it's constantly reading the fuel is Full.
car has spark, and fuel pressure, it,s been 4 weeks since it was cleaned and still wont run right. no codes come up !