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 Problems

Improper 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.

Car Won't Start and Security Light is On

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.

Power Window Regulators may Fail

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.

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1990 Cadillac DeVille Questions

engine 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.

Is there a way to reset the fuel reader if it reading (F) all the time on a 1986 (1 answer)

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.

engine bay was cleaned soaked, car starts , but idle is so rough, and jumpy . (1 answer)

car has spark, and fuel pressure, it,s been 4 weeks since it was cleaned and still wont run right. no codes come up !

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1990 Cadillac DeVille Recalls

Recall 90E043004
THREADED INFLATOR COMPONENTS MAY HAVE BEEN DAMAGED DURING ASSEMBLY WHICH MAY ALLOW COMPONENTS TO SEPARATE WHEN INFLATOR RECEIVES A SIGNAL TO DEPLOY THE AIR BAG.

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1990 Cadillac DeVille Reviews

THE CAR IS DieD OVER NIGHT one THE CLOCK light STAYS ON WHEN I TURN OFF THE IGNITION. IT HAS THE WRONG BATTERY IN IT. THE CLOCK SET FOR THE HOUR DOES NOT WORK. IS THAT WHAT DRAINS THE BATTERY? Other than that it runs very good. One time owner I have not registered the car yet I would be the second owner to it!!! after today it may have an extra 100 miles added.
MY DAUGHTER GAVE ME HER 1990 CADDY DEVILLE WHEN ME JEEP LET ME DOWN.IT WAS RUNNING PERTTY ROUGH WHEN I GOT IT,BUT NOW I HAVE WORKED ON IT AND IT IS RUNNING GREAT BUT,THE SERVICE LIGHT IS ON AND IT HASENT GONE OUT BUT TWICE.I REALLY LOVE THIS OLD CAR BUT THE LIGHT IS WORRING ME.
bought it 2 years ago 165k 1 family car brfore i bought it. was maintained very well. i have put 20k on it with no major repaires. i get 19 mpg when careful..i love it

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