Question about 2002 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?
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
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
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
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
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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