You have a problem with the air ride suspension. Sounds like a bad compressor or a leak.
There are two fuse boxes in a 1995 De ville, one is in the trunk on the drivers side next to the trunk release and the other is under the hood driver's side by the wiper fluide bottle. It maybe under the back seat. The battery is under the back seat in our 2001 cadillac.
Look in the ownser manual. There are three bolts to remove. Once you do this pull on the lamp and you will see the access pannel on the back of the assembly.
That would explain the punch Jonna gave to Ville back in the days.
Disconnecting the negative battery cable for a few minutes will clear the codes. But if you don't repair the reason the check engine came on the light will only come back on.
Is small ville coming back in 2012
Pry the lower end of the bench back to release clips Lift bench out Lower end ofback of seat is held in by either 2 bolts or clips that are now accessible - release these and you will be able to slide back up toward rear windshield to release
The check engine light on a 1999 Cadillac DeVille can be reset by disconnecting the battery for 30 seconds. The light will immediately come back on if the problem still exists.
make him/her rejoin
im assuming you mean the caliper piston. they make a tool for it but you can use pliers to turn in clockwise and keep pressure on it and it will go in. you may be turning awhile but it will work.
Jonna (back in 2005 I believe)
Grab it from underneath the front of the back seat and exert a little pressure to jerk it up. It won't hurt the seat. The battery is located under the back seat. The seat goes back with no problem.
Have the problem that caused the check engine light to come on repaired. They will reset the light with an OBD2 scan tool. The light will just come back on if the problem is not repaired.