Question about 2003 GMC Envoy Xl

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Is it possible to lower the rear ride height on an 03 envoy xl by moving the air ride accuators?

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If you can lower the actuators without damaging them, it should work. The ride height should drop the same amount that the actuators are lowered. Don't go too low or you will bottom out the air shocks.

Posted on Jan 01, 2011

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Air supension stays too high


There could be a couple of problems, first and easiest is the rear height sensor became disconnected from its mount. This is common because the sponsor clips on by a kinda weak spring and can be easily disconnected.also where the sensor mounts is a small round metal ball that screws onto frame and rear suspension, the balls after time wear to the point that the sensor spring cannot hold on.there's also an adjustment on the lower mount, if you move it up the vehicle will lower....then you could have a concern with the air compressor vent not allowing it to vent down to ride height. Or the vent solenoid on top of each bag stuck also not allowing it to vent..to ck it yourself, go for a short ride around the block and when you come back park on a level surface, shut off car, exit and close door....listen for an auditable click in the rear, and front left corner of car and watch the distance between rite and wheel lip, see if it drops. If it does I would be leaning towards the simple adjustment...also check thr front ride height on level surface, if you have a suspension problem on 1side of the car and it sits lower,it will throw off rear ride height. ...

Jun 10, 2014 | 1995 Lincoln Town Car

1 Answer

What does air suspension consist of


Air actuators (air chambers) on each corner of the vehicle, a compressor to inflate the actuators, ride height sensors and a control ecu to control the function. That's a basic overview, hope it helps

Jan 28, 2014 | 2006 GMC Envoy XL Denali

1 Answer

Air suspension gmc envoy


The actuator rod and ride height adjuster is stuck it is located on the axle to frame of the vehicle remove rod to adjust back down then re install after cleaning the adjuster of debri if still not working correctly replace actuator

May 20, 2013 | 2002 GMC Envoy XL

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

2 Answers

I have a 2002 GMC Envoy XL that blows cold air from the rear heat vents. What could the cause be?


the heat accuator could be bad. It is a motorized part that adjusts your temprature by allowing cold or warm air flow when you adjust the temprature at the knob you are turning

Jan 21, 2011 | 2002 GMC Envoy

1 Answer

The "service ride control" warning


Sounds like your air ride is malfunctioning could be a defect in bag,line, or sensor or possibly more the ecm should fire out a code if you have a code reader

Jan 05, 2011 | 2003 GMC Envoy Xl

1 Answer

I have a 2003 envoy where the rear end is riding realy low any ideas


I had the same problem with my '02 Envoy 4x4; had the soap test done and there were no leaks; also had the air compressor motor checked and mechanics said it was fine. The rear air bags were worn and cracked so I had them replaced. It lifted and rode at the correct ride height for a few weeks.
After having the rear air bags replaced I noticed that it was starting to not lift as before. Had another diagnostic check; the air compressor was not forcing air through the system in order to lift the vehicle. The air compressor motor was replaced. Compressor comes on and shuts off now.
Vehicle is at the normal ride height now.
Rear air bags and air compressor motor were dealership parts; unable to find after market; not recommended to replace with used parts.
I had the dealership to run the diagnostics and had another mechanic to replace the parts. Total repair for bags, motor + labor = $1500

Nov 14, 2010 | 2002 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

1 Answer

EXPEDITION REAR AIR RIDE PROBLEM


do you have just rear air suspension? here's rear only. 4 wheel different. Deler an run a diagnostic test with WDS machine and get fault codes.
-------------------------------------------------------------------------------------
The air suspension system is designed to improve ride, handling and general vehicle performance for static, on-road and off-road driving conditions:
  • Ride is improved by using an air type spring (the soft ride is inherent).
  • Handling is improved by maintaining constant vehicle attitude.
The system consists of unique rear air springs, the air compressor, air lines, air spring solenoids, height sensor, air suspension control module, attachments and associated signals derived from both driver and road inputs. With these components and signals, the air suspension control module commands changes in vehicle height that are necessary for the load leveling features.
The load leveling feature rear air suspension (RAS) systems shall automatically make adjustments in vehicle height so that the vehicle is always at trim height and constant front-to-rear vehicle attitudes are maintained over the expected load range of the vehicle. Adjustments in height that are necessary to correct height differences between the vehicle's left and right sides for the RAS system shall be restricted to what can be reliably achieved with one air suspension height sensor.
The system uses one air suspension height sensor, a steering sensor, generic electronic module (GEM) and other vehicle sensors to measure driver and road inputs. The system changes vehicle height using an air compressor, two air lines and the use of air springs with air spring solenoids.
The air suspension system holds vehicle height when the rear hatch or any door is opened. The system stores rear vehicle height the moment any open door is detected. The system then maintains this height regardless of the addition or removal of a load. The system will return to its commanded height when all doors are closed or the vehicle speed exceeds 16 km/h (10 mph).
----------------------------------------------------------------------------------------
Air Suspension Height Sensor
One air suspension height sensor is mounted on the vehicle. The air suspension height sensor sends a voltage signal to the air suspension control module. The output ranges from approximately 4.75 volts at minimum height (when the vehicle is low or in full jounce), to 0.25 volts at maximum height (when the vehicle is high or in full rebound). The air suspension height sensor has a useable range of 80 mm (3.2 in) compared to total suspension travel of 200-250 mm (8 to 10 in) at the wheel. Therefore, the air suspension height sensor is mounted to the suspension at a point where full rear suspension travel at the wheel is relative to 80 mm (3.2 in) of travel at the air suspension height sensor. The air suspension height sensor is attached between the No. 5 frame crossmember (upper socket) and the panhard rod (lower socket).
When the air suspension height sensor indicates that the rear of the vehicle is lower than trim under normal driving conditions, the air compressor will turn on and pump compressed air to the air springs. When the sensor indicates that the rear of the vehicle is raised above trim under normal driving conditions, this will cause the air to be vented from the air springs to lower the vehicle back to its trim height level
------------------------------------------------------------------------------
  • Uneven vehicle height
  • Circuitry.
  • Rear pneumatic fault.
  • Air compressor assembly.
  • Air suspension control module.
  • Go To Pinpoint Test I .

Feb 21, 2009 | 2001 Ford Expedition

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