Question about 2002 GMC Envoy

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Gmc my back air shocks keep losing presure and the vehicle is low to the ground i wait for a while and it comes back up -- it does this constantly . it is a SLT utilty model

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There is a self leveling box on the axle or there abouts it needs adjustment follow the lines to the box and set it up or down this is a good starting point

Posted on Sep 06, 2009

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Posted on Jan 02, 2017

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1 Answer

Where is low side of air conditoner


There are 2 lines coming from the firewall on any vehicle that has ac. One is the high presure the other is the low presure. Follow each line until you find fill valve.

This valve is used to fill the system. It will be covered by a plastic cap that screws on. Each side, the high and low has one of these valves. Often the cap is labeled with an "L" for low or "H" for high. Another way to tell is to flip the caps upside down. The low presure side will always be the smaller of the 2.

Jul 05, 2014 | 2006 Ford F-150

1 Answer

Losing power at higher rpms, on when going up hills or passing.


could be low fuel presure /mass air flow sensor /or restricted catalist system check exaust back presure

Sep 09, 2013 | 2004 Lincoln Aviator

1 Answer

I have a 2004 GMC Envoy xuv and my rear shocks keep losing air. I think they are made w airbags. I was just wondering if they can be patched up or do they need all new airbags and where can u find new ones...


The air bags should be strong and not leaking themselves. It may be a valve on the bags or the plastic line going to the back that is leaking.
Some soapy water sprayed on the air ride items may show bubbles from where its leaking. Like checking a tire for leaks.

Oct 07, 2011 | 2005 GMC Envoy Xl

1 Answer

1997 Cadilac Deville D'Elegance My air shocks are always low. Can I take off the tires; jack up the car; and fill the shocks with silicone and let them "harden?" The silicone that you use...


It wont work because the sponginess in the air shocks is due to the compressability of air. The silicone, being a liquid, will not compress. If you've given up on the air system, why not just replace the shocks with some good gas shocks?

Jun 26, 2011 | Cadillac DeVille Cars & Trucks

3 Answers

What cause a truck to rock side to side when driving?


Does the vehicle rock faster at higher speeds, or is it a constant no matter how fast you're going? Is it a gentle rock, or does it seem like more of a shake at higher speeds? Does your vehicle have hydraulic shocks, air shocks or regular shocks and springs?
If your vehicle is rocking at low speeds and the rock turns into a shake or vibration at higher speeds, you might have a bent axle. For this problem to be bad enough to fees as a rocking motion at low speeds you should probably be able to tell by looking at your wheels -- if your axle is bent, you should see that one of the wheels seems tilted slightly. If you move your car a few feet and look again, it should look like it is tilted in a different direction. If this is the case, have the axle replaced ASAP to avoid more damage to your suspension system.
If the rocking does not change at any speed, then you have to consider your suspension system. If you have a hydraulic or air suspension on your vehicle, it might be malfunctioning. If you have air shocks, one of the air bags that holds your vehicle in the correct position could have a slow leak -- this could cause that part of the suspension to float down as it loses pressure and back up as the pump adds more air -- which would feel like a slow rock inside the car. The same could happen with a leaking hydraulic. If this is the case, bring the vehicle in to a mechanic and have your suspension checked ASAP to avoid causing more damage to the system.
If neither of these is the case your wheels might be out of alignment. This would also cause a funny, cyclical noise from your tires as you drive and should be taken care of ASAP as it will cause extreme wear on your tires. If this is the case, your tires will probably already show uneven wear on the tread (if the inside of the tread (near the center of the car) is worn out more than the outside of the tread then this could indicate a bad alignment).
If your tires are not worn funny, and nothing else here has helped, you might have bad tie rod ends, ball joints or loose lug nuts on one of your wheels. First, make sure the lug nuts on each tire are properly tightened -- if there were loose nuts you might have fixed it. If all of the nuts are tight, jack up your front end so your tires (one at a time) is about an inch off the ground. Grab the top and bottom of the tire and try to rock the wheel -- if the top and bottom of the wheel move towards the center of the car, you probably have bad ball joints and you should have these replaced IMMEDIATELY (they are a vital part of your steering system and need to be in good shape for safe driving). If the wheel does not rock up and down, try grabbing the tire on the front and back and see if it rocks (if you have only 1 tire off the ground there should be no play ... if both front tires are in the air then pay attention to the tire on the other side of the car as you do this or have someone hold the steering wheel). If the tire moves, without turning the steering system of the car (the other tire doesn't move with it) then it's likely to be your tie rods or tie-rod ends. These are also a vital part of the steering system of your vehicle and should be replaced IMMEDIATELY to ensure safe driving.
If none of these are the problem. take the vehicle to a mechanic and tell him what you have done to check the vehicle (this can save time by helping the mechanic eliminate possible causes).

Jun 01, 2011 | 2003 Nissan Pathfinder

1 Answer

Service Ride Control light flashes constantly" Is this serious?


Robert,
When you come out in the morning is the vehicle sitting low to the ground especially on one corner or one end? Can you hear an air pump that seems to run for a long time? These are notorious for having the air suspension bags to start leaking. The only fix is to replace the bags. This is not a job for an amature. You can get be seriously hurt or killed if you don't know exactly what you are doing. Take it to a pro.
Thanks, rich

Sep 23, 2009 | 1994 Cadillac DeVille

2 Answers

Truck AC keeps kicking off


Have you tested the presure in the system? Check the condensor, (is it clogged or restricted, also check the clutch fan. With engine NOT running, move the blade up and down. You should feel a resistance and there should me no lateral (front to back of vehicle) play.

Aug 15, 2009 | 1999 Ford F250 Regular Cab

2 Answers

Rear Air Shock Problems


The car will still run level due to the fact the springs are holding them up. If the shocks are wet there internal seals are shot, so it is time to replace them.

Dec 13, 2008 | 2000 GMC Jimmy

1 Answer

2004 GMC XUV rear air shock failure


chances are that your leveling sensor is the problem this is located on the shocks themselves.

Sep 20, 2008 | 2004 GMC Envoy

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