Fuse for rear air bags air compressor - 2004 GMC Envoy XL

First check to see if the pump runs when the key is turned on, if not check the 30 amp fuse in the fuse box right side under the hood. If the fuse is blow the pump may have over heated from running longer than it should. As old as this car is it most likely has dry rotted air bags. If the pump runs spray the rear bags with windex and look for any bubbles should be none. This could get expensive if the pump is already gone.

The first thing to check would be the compressor, check all fuses and see if compressor is running.

i can tell you that most air bag systems develop a leak in the bags and the problem is not fixed inturn the air compressor runs so much to fill leaking bags that it over heats and destroys the compressor. most of the time the compressor fuse will blow, so check fuses first and then compressor. I have never seen a 1992 lexus with air bags.

The compressor was running full time when the air bag was blown out. It probably fired the compressor. They are designed to run intermittently.

the rear air bags are leaking. you can replace the rear air bags with springs. http://www.arnottindustries.com/

the most common problem in this truckr and the Ford expidition is that the rear suspension air springs are leaking, they last about 75,000 miles, less on really rough roads.

I have a 2001 Expedition, I don't have air bags in the front, the compressor don't work the air shocks. You have rear leveling. When they replaced the (compressor) did they turn the leveling switch back on. you may have air shocks connected to the compressor. Did the rear go down right after or over a couple of days. If the switch is on, turn it off and jack the rear up quiet a bit, make sure both side are quiet equal with each other, like it would be if it where raised by the air bags. Turn your level switch back on with it jacked up or sitting on stands. It may have went down so much that the compressor can't raise them back up.

You may have a leak in the rear air bags or the compressor for the air bags is not working,listen when you turn on the key to see if you can hear the compressor run ,if you do then likely the bags,if not then likely the compressor.

make sure its turned on, the switch is in the trunk. The compressor is in RF area ahead of RF tire, the fuse which may be blown is in the fuse box at RF wheel under the hood. if the fuse is blown, its because the compressor has run too long trying to pump up the air bags which are leaking. it may need the bags and compressor, there are several companies that make springs for the rear to replace the bags.

If your compressor is running all the time, it is almost certain that you have a leak. It could be either in the lines going to the rear air bags, or the air bags themselves. Simplest way to find a leak, is to get a spray bottle with soapy water, make sure the suspension is aired up, and spray the lines starting from the compressor. Work all the way back to the bags, now when you get the bags nice and soapy then bounce the rear of the truck up and down. If their are any leaks the soapy water will bubble up showing you wear the leak it.
That is how i would start.

If its a bigger leak the rear air bags wont stay aired up, if its a small leak, then the air compressor will be running all the time to keep the truck aired up.

Remember, when you are driving, the compressor is constantly working to keep the rear bags at the proper height, even more so on rough roads.

try the air compressor as they also go bad