Question about 2002 GMC Envoy

1 Answer

The rear end is couple inches off the ground, the compressor kicks on nonstop but can't raise it

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

The compressor is burnt out. Mine did the same thing. Take it to the dealer. It'll cost about 800.

Posted on Aug 06, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My ELC compressor do not come on buick


When you turn the key on, after a couple of seconds the system should cycle the compressor on for a couple seconds at least. If not, you'll need to troubleshoot if it is an electrical problem (fuse, relay, height switch/sensor, wiring in between components/bad connections) or a mechanical problem (compressor, hoses, bladder on air shocks leaking air).

There is a fuse & a relay for the Electronic Level Control/ELC also called Automatic Level Control/ALC under the back seat in the power distribution block/fuse. Switch out a relay with a similar one and check the fuse for a burnt center section.

There is a ride height sensor attached to one of the rear control arms. With the vehicle safely raised and supported, disconnect the 'link' from the sensor to the suspension arm. With the key ON and engine NOT running, push the arm on the ride height to the compressed/riding low setting. After about 15-30 seconds (it is slow to respond or it would kick on and off over every bump) the compressor should turn on and begin filling the air bladders on the rear shocks.

If the compressor still fails to come on, you'll need to unhook the harness connector at the compressor. Again, with the key ON, engine OFF, height sensor compressed connect a voltmeter to the Dark Green wire on the chassis side of the harness connector (there are four wires to the compressor. 2 wires are for the electric motor to raise the car, and 2 wires are for the Vent solenoid the releases air pressure lowers the car) and ground to see if the compressor is being told to turn on by the height sensor. If it is being commanded on and supplied electricity, and still doesn't make noise or pressure, then replace it off a similar year GM vehicle that has rear air suspension (Cadillacs, Buicks, Oldsmobile Auroras). As long as the compressors are the same, you can just remount it in your car's mounting bracket assembly and save some $$.

If the compressor comes on but the car won't rise, check the air lines to each shock from the compressor, the bladders on the shocks themselves, the filter on the compressor intake or even the vent solenoid assembly on the compressor unit has been known to leak/corrode/stick.

Good luck.

Apr 14, 2014 | 2000 Buick LeSabre

1 Answer

The air ride in my 02 seville wont raise the rear.I hear the compressor kick in when the car is started at least i think its the compressor it's coming from the rear Any idea how to fix it ?


Here's an idea to get you started.
Put the back end of the car up on ramps so you can crawl underneath it.
With the front tires blocked securely, have a helper get into the car and roll down the windows so they can hear you talk from under the car.
Have the parking brake set.
Take a bucket or container of soapy water and a brush, and / or a spray bottle of soapy water, and crawl under to car.
Have the helper start the car, and look and listen for leaks.
I have heard the air bags leak on air ride cars after a few years. The soapy water should show a leak when applied to the air bags and the air lines.

Jan 07, 2013 | Cars & Trucks

1 Answer

Can't find the relay for the electronic level control(elc) for a 1999 cadillac eldorado


1. Locate the automatic level control height sensor under the rear of the vehicle on the rear suspension support. If the back of the car is too low and will not pump up, ground pin B Yellow wire and see if the compressor will come on and the car will raise.

2. If the car does raise when pin B is grounded, check the powers and grounds to the height sensor.
3. If the powers and grounds are OK and the pump does come on and the car raises when pin B is grounded, the height sensor will need to be replaced.

4. If the car is too high and will not come down, ground pin E White wire at the height sensor to see if the car will lower.

5. If the car lowers when the White wire in pin E is grounded, check the powers and grounds to the height sensor.

6. If powers and grounds are OK and the car does lower when pin E is grounded, the height sensor will need to be replaced. Tech Tips: There are two different automatic level control systems for this car; one is without RPO F45 and one is with RPO F45. The system without F45 has an automatic level control height sensor and with F45 the automatic level control compressor is controlled by the continuously variable road sensing suspension module. Tests/Procedures: 1. Using a head lamp as a load, test the ELC height sensor power/grounds.

2. The power feeds are: Orange wire, pin C and a Brown wire, pin D.

3. The ground is pin A, Black wire.

4. Ground the White wire at the height sensor, check that the vent solenoid in the ELC compressor clicks and vents the air from the system. Author: Bill Siegmann

Dec 24, 2012 | 1999 Cadillac Eldorado

1 Answer

How do you replace the rear strut on a 1985 Nissan 300zx?


To remove the shock u raise the car and support semi-trailing arm. Disconnect shock upper and lower end but an remove the absorber. U install it in reverse but the final tightening of the nuts should be when the car on the ground and the tires touching the ground. For the spring u use a spring compressor and u just compress till it gets out. If u need more info kill-your-god@hotmail.com and send me pictures

Nov 03, 2012 | Cars & Trucks

1 Answer

Intructions on how to replace a gearbox on a 1987 GMC suburban


set the front wheels in straight ahead position by driving vechicle a short distance on a flat surface. raise and support the vechicle safely on jack stands.place a drain pan below the steering gear. disconnect negative battery cable.disconnect fluid lines.cap the openings.mark the relationship of the pitman arm to the pitman shaft.remove pitman shaft nut and then remove the pitman arm from the pitman shaft using puller J - 6632. remove the steering gear to frame bolts and remove the gear assembly. TO INSTALL align the flat of the flexible coupling with the flat on the shaft push the coupling onto the shaft until the wormshaft bottoms against the end of the shaft.install the pinch bolt. make sure the bolt passes through the shaft undercut. tighten the pinch bolt to 75 ft lbs. place the steering gear into position guiding the coupling bolts into the proper holes in the shaft flange. install the steering gear to frame bolts and torque to 66 ft lbs.install the coupling flange nuts and washers. make sure the coupling alignment pins are centered in the flange slots. tighten the nuts to 20 ft lbs. maintain a coupling to flang dimension of 0.250 - 0.375 inches. install the pitman arm.install the hoses. you are done except bleeding power steering system. BLEEDING POWER STEERING. fill the the power steering pump reservoir to the proper level and let the fluid remain undisturbed for at least 2 minutes. start the engine and run it for only about 2 seconds.add fluid as necessary. keep doing this procedure until fluid level stop dropping. then raise the front of vechicle so the front wheels are off the ground.set the parking brake and block both rear wheels front and rear. manual transmission should be in neutral. automatic transmission should be in park. start the engine and run it at approximately 1500 rpm. turn the wheels off the ground to the right and left lightly, contacting the stops.add fluid as necessary. lower the vechicle and turn the wheels right and left on the ground.check the level and refill as necessary. if the fluid is extremely foamy, let the vechicle stand for a few minutes.with the engine off and repeat the procedure. if fluid looks foamy. once all done.dont drive vechicle on highway until normal steering is obtain.

Apr 13, 2011 | 1987 GMC Suburban

1 Answer

Back end of my 2001 Ford Expedition FWD, Eddie Bauer, was dragging. Had diagnostic test run and found out it needed a new air ride compressor. Had compressor installed, but compressor continues to run...


The compressor should only run until the rear suspension reaches the desired height. If it continues to run after the suspension has raised to ride height then you may have a leaking air bag/solenoid or line. If you dont have any leaks it is possible the EVO(air suspension module} or relay is at fault.

Nov 14, 2010 | 2001 Ford Expedition

1 Answer

I have a 99 ford expedition i replaced the air compressor cause the front air shocks were bad and ruined the compressor. and teh rear air bags went flat now that the new compressor is in the rear wont air...


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.

Jan 04, 2010 | 1999 Ford Expedition

1 Answer

Troubleshooting Suspension failure 2000 Lincoln Navigator


I have owned several air suspension vehicles. My Expedition was similar to yours. You may want to try the 4x4 switch because it will raise the body 1-2 inches higher. Checking its fuse would not hurt.

On most of my vehicles the suspension would work end to end, raising the front first. You could have 2 issues with the suspension. There should be valving to switch the air to the rear suspension after the front is up. I would wait longer for the rear to catch up.

If I had to guess why the front lifts first it would be to get the front off of the curbs and sidewalks when you park so the bottom doesn't drag.

There is a diagnostic plug for the air suspension and sometimes Autozone or Oreillys have the scanner for that special plug. If not, some alignment shops and all dealers would have it. Also Ford parts are often the same as Lincoln and cheaper., Someone may make aftermarket parts at a better price.

Dec 02, 2009 | Lincoln Navigator Cars & Trucks

1 Answer

The rear suspension is down on my 1999 Ford Expedition - Eddie Bauer. The cause: while out in the woods I came across a small dip which cause my back left wheel to lift off the ground. The suspension...


I had a 1999 Expedition. When you put the 4x4 on it raises the vehicle an extra inch or 2.
It may help to turn the 4x4 off. Two wheel drive is a lower air setting.
Your original pump may still be good. The problem can be in the front. The compressor is not filling the front suspension to the cutoff point. It will lift the rear after the front end is at running height. Since you lost the front end first, the remaining air bled out there and then the rear came down. Once you shut down the car the suspension was done, all the air was let go.
There are adjustment solenoids on the body but you need someone qualified to repair this.

Sep 05, 2009 | 1999 Ford Expedition

2 Answers

Rear Suspension on 1996 Cadillac Deville


you may want to buy regular heavy duty shocks and put on the car to raise the back up high enough to do what you are trying to do.

Feb 17, 2009 | 1996 Cadillac DeVille

Not finding what you are looking for?
2002 GMC Envoy Logo

Related Topics:

171 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

60541 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21927 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...