20 Most Recent 1988 Cadillac Sedan DeVille Questions & Answers

Nope, they didn't know what a limp mode was back in 88. You might try running an additive through for a bit, then doing a filter and fluid change, but those early ones were fully mechanical exept for the lockup on the converter.

You can do an internet search for the list by looking for Cadillac OBD 1 code list.

Where is the air injection safety valves located on 2000 Cadillac deville

Question edited for clarity. Question moved to model category. There is on one generic Cadillac video on this. It is a very old model. https://www.google.com/search?q=1988+Cadillac+Deville+Sedan+replace+power+steering+pump ..

Touch both heater hoses going to the heater core. They should both be hot. If they are, then the problem is probably a broken or binding blend door or bad blend door actuator. If one hose is hot and the other cold, then the heater core is clogged.

Its possible your car have corroded Wires in the system and needs replacement, have it checked by a qualified car electrician.

How about the passenger side - does it unlock with the key and switch there? Can you open the drivers door with a key? If both these are true, probably the unlock switch on the drivers door is faulty.

maybe low on coolant, check water to coolant ratio.

The light is on because the system fuse was removed, this causes the control module to see a fault. either fix the system or pull the dash and remove the warning bulb.

These are replaced from inside the trunk, after moving the soft rug out of the way. Twist the socket and it comes right out.

find out which is missing spark or fuel while you try to start it. if it starts when it cools down could be ignition module

Is the battery good? Some auto parts places will let you check

Takes a special tool you can get at any autoparts store. Remove the handles etc and then use the tool to pull the retaining clips that hold the panel on. If you don't use the tool you will damage the door panel.

To begin with, check the "ride level" fuse and make sure that the ride level compressor does work, and you should be able to hear that the ride level compressor is working when the ride level system is leveling the vehicle.

The ride level system uses an air compressor and either an air type of shocks or a type of air billow to raise and lower the vehicle, there is an adjustment to set the ride height and it is located under the vehicle and there is a control lever or rod that should be connected between the rear axle and a switch that is mounted on the body of the vehicle, and there will be an adjustment slot in the control lever between the switch and the body, and that is how you would adjust the ride level height, but be sure that the vehicle can not drop any further down if someone is under the vehicle trying to adjust the ride height.

However, you might find that the control lever to the ride level has fallen off from the switch on the body or it has come loose from the rear axle, and it is just hanging there not operating the switch on the body that controls the the ride level compressor, or there might be a blown out air shock or billow, or you might find that an air line from the compressor is leaking and the ride level compressor will just run continuously until it blows out the fuse, and if that is the case you might also find out that the air compressor has burned out from running continuously.

I hope that this information will help you to solve your ride level problem.

surging is usually a fuel problem , check the accelerator is opening the throttle smoothly , loook for any signs of wear or holes in the air and vacuum lines , remove the air filter and see if it improves things , if all ok i'd get the timing checked , when was the last time the vehicle had a service ?

The bulbs are removed from the back of the lens housing. Some can be reached from under the hood, others need to have the lens assembly removed from the front.