Question about 2002 GMC Envoy

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Air suspension gmc envoy

My back suspension goes up and down only when it wants to. lately it is not coming up and im bouncing while driving. Yesterday it came up and now its staying down. I dont understand what needs to be fixed. Is it a problem with the computer sensor or something els?

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  • 103 Answers

Sounds like a bad sensor or bad Chasis ECM. They do sell conversion kits to change over to coil springs, which I had to do on my 2001 Navigator a few years ago. No more headaches after the conversion.

Posted on Mar 21, 2014

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Posted on Jan 02, 2017

  • 1056 Answers

SOURCE: 2002 gmc envoy front suspension noise

Thanks for providing that information.
At 65K I would first suggest changing shocks. Yes, that is enough mileage to have them beginning to get "softer" which will increase suspension travel and noise.
Even though they may test good (usual test is jumping on the bumper to see how it responds after bouncing) but that really doesn't apply to shock/strut combinations.
I would suggest a higher then factory grade replacement shock. Do realize 60% of the weight for that vehicle is in the front.
Next, there is always some, what they call "spring seating" as a vehicle gets older. You will notice it more when the suspension is in a turn, going over a bump. The spring moves / rotates in the seat, and you will hear a sometimes loud popping or clicking noise.
Bushings are probably best left to the professionals, unless you happen to have a well equipped shop at home.Same goes for the struts. You will need a good spring compressor to be able to change them, and you will need to have an alignment done after changing them. Doing the bushings at the same time is easy once the struts are out.

Since it is 4WD you mine want to test the front CV joints also. If you have access to a lift, put it in the air so all 4 wheels are off the ground, and running it. Listen to each front wheel to see if you can hear any CV noise. Please be very careful doing this. Doing it incorrectly can result in injury.

What you want to do more then anything is take this a step at a time. When you hear a noise inside a car, it can sound like it is coming from one place, and you can find out later, it is somewhere else.

I think a Haynes manual is going to be a good guide for you on this problem.
Take you time, and be very careful doing this kind of work. If at anytime you are not 100% comfortable doing the work, consult a professional.
Sorry I can't be more help as a simple fix, but I'm limited diagnosing any further without have the vehicle at my access.

Posted on Nov 15, 2008

  • 753 Answers

SOURCE: 2006 GMC Envoy Denali air ride suspension

Sounds like you have a bad air shock.

Posted on Aug 22, 2009

  • 293 Answers

SOURCE: 2007 GMC Envoy - Gas gauge showing empty and check engine light

This is a safety feature that the vehicle brings. You need to reset the E.C.U on dealership or it will keep doing it to you. It was probably caused by one single time that you did not closed the fuel cap correctly. Good luck

Posted on Dec 29, 2009

  • 63 Answers

SOURCE: 2006 GMC Envoy Air suspension - Back of the car is

yes you must have a leak somewhere. maybe in the air bags or the lines. jack up the car while there is still air in the bags get some soapy water in a spray bottle and start spraying the air bag and lines and pump until you find the leak. then replace whats needed.

Posted on Jan 06, 2010

  • 40 Answers

SOURCE: my gmc envoy fuel gauge goes around pass empty.

it needs a new float. it will be available to you at your local GM dealer. u need to remove the tank and fuel pump assembly. replace the gauge float and reinstall

Posted on Jan 29, 2010

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1 Answer

Where is the switch for the air suspension


Turn Off Suspension Switch Before Jacking/Lifting Vehicle ...

repairpal.com > Problems > Lincoln > Navigator
Turn Off Air Suspension System Before Jacking/Lifting Vehicle on Lincoln Navigator. Prior to jacking or lifting a vehicle with air suspension, you must turn off thesuspension switch. The switch is generally located in the trunk or on the right side of the passenger foot well. RepairPal Verified.

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Nov 01, 2015 | GMC Envoy Cars & Trucks

1 Answer

Suspension deflates in cold weather


air compressors do not operate below 28 degrees you have to get them warm first I assume that your compressor is under your hood as long as you allow your truck to get cold or keep the air suspension your going to have this problem

Dec 09, 2013 | 2006 GMC Envoy XL Denali

2 Answers

Rear air suspension leaks down


check for leaks in the lines, also check to see if the shocks have air leaks.

Sep 12, 2012 | 2004 GMC Envoy

3 Answers

When my envoy sits overnight my rearend drops down


There has been a service bulletin for that type of concern. Here is what it states.









Suspension - Rear Suspension Is Low/Sagging/Uneven

Notes




ENGINEERING INFORMATION

Bulletin No.: 06-03-09-006B

Date: December 15, 2008
Subject:
EI06006 - Rear Suspension Uneven, Sagging, Low (Recalibrate Air Spring Sensor)

Models:
2006-2007 Buick Rainier
2006-2007 Chevrolet TrailBlazer SS
2006-2007 GMC Envoy, Envoy XL
2006-2007 Saab 9-7X


with Suspension Pkg - Rear Load Leveling (RPO G67)

Supercede:

This bulletin is being revised to update the labor operation in the warranty information. Please discard Corporate Bulletin Number 06-03-09-006A (Section 03 - Suspension).

Condition

Some customers may comment on the rear suspension being uneven or sagging.

Correction

DO NOT REPLACE THE COMPRESSOR.

Based on technician feedback, engineering has determined that the customer's concern can be corrected by recalibrating the air spring sensor. Refer to the Trim Height Uneven or Low diagnostics and Air Spring Sensor Calibration procedure found in SI.

Nov 29, 2011 | 2004 GMC Envoy

1 Answer

How to remove rear suspension airbags on 2006 gmc envoy denali


they are bolted in a not to hard to remove once the air is drained from them however you can not drive it without the air bags. It will bounce way to much to control the truck.

Nov 30, 2010 | 2006 GMC Envoy Denali

1 Answer

My envoy back tires are goin up, so mi car is to high in the back i just went to get a change oil then it is happend they said it is someting like compresor air in the back i dont know noting abot it


You have an air suspension in the rear and apparently the leveling sensor is not working correctly and telling the compressor to come on too long. A mechanic will need to check the air suspension out.

Sep 28, 2010 | 2002 GMC Envoy

2 Answers

My car drops in the back at night . but lifts back up when the car is started


sounds like bad air shocks, or a leaking line, most of the time its the shock , they get rusted and dont seal that good anymore and the air slowly leaks out.

Mar 11, 2010 | 2003 GMC Envoy

1 Answer

2006 GMC Envoy Air suspension - Back of the car is on the wheels every morning. Is this a problem with the Air suspension?


yes you must have a leak somewhere. maybe in the air bags or the lines. jack up the car while there is still air in the bags get some soapy water in a spray bottle and start spraying the air bag and lines and pump until you find the leak. then replace whats needed.

Jan 06, 2010 | 2006 GMC Envoy

2 Answers

Removing rear air suspension on GMC Envoy


Just behind right rear tire up in the wheel well. Air inlet is inside right rear quarter near the accessory inflator. Compressor runs 3 lines one for the accessory inflator and one for each air bag.
THere are also 2 sensors, one on each trailing arm that senses load and then raises and lowers accordingly.

Dec 28, 2009 | 2002 GMC Envoy XL

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