Question about 2006 GMC Yukon Xl Denali

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Adjust ride height sensor

Recently, seems as though my rear air shock pump runs longer and does not seem to raise when I have the weight of my boat on hitch. Never use to do this, but runs fine with out boat. Is it time to replace pump, shocks, sensor???

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

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  • 116 Answers

SOURCE: Rear Air Shock Problems

springs & air bags in the shock hold the truck level
if they are wet with oil the seal is leaking
replace the shocks

Posted on Dec 13, 2008

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emissionwiz
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SOURCE: level ride shocks not working.

have a self test run buy the dealer on the self leveling system, most common causes are the ride height sensor, the air pump is defective or the pump relay is defective.

Posted on Mar 06, 2009

emissionwiz
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SOURCE: what is the service ride control error? i thought

it means there is a problem with the air suspension.

Posted on Jun 05, 2009

  • 564 Answers

SOURCE: air shock on 03 escalade wont air up. Service ride

may be a bad shock warning these are expensive.or could be a bad ride leveler or height sensor

Posted on Jul 06, 2009

emissionwiz
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SOURCE: 2005 denali service ride control / air suspension pump

the leak almost 100% of the time is in the air bags of the shocks, there are special tools for isolating the individual shocks and seeing if they leak, but as far as the home repair goes u just replace them or have the dealer test them.

Posted on Jul 20, 2009

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2 Answers

Im tryn to locate the air conpressor so I can rise the shocks.


usually this is located under the hood on fender wells. if nothing else start at the shock and follow air line to the pump. the system is on a self leveling switch located on rear axle which adjust to weight of car turning on the pump for proper ride height and comfort. you should determine why this system is not working. and yes usually there is a valve on the pump which allow you to manually introduce air into the system.

Jan 11, 2011 | 1994 Cadillac DeVille

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What is the differnce of a Lt autoride and a Lt


the lt autoride has self adjusting shocks, and the regular lt doesn't. if you look the autoride has airlines going to the shocks.

Nov 08, 2010 | 2002 Chevrolet Tahoe

1 Answer

What does the "leveling" light in the dash mean in my 2000 cadillac catera. why is it on and how do i fix it. put new rear shocks in it and now it stays on all the time.


What the leveling system is is basically a height sensor for the rear height, air shocks, an air compressor and air lines. What happens is the height sensor knows what is considered a normal ride height. When people or items are added at the rear seat or trunk the vehicle sits lower. The air compressor will turn on and attempt to pump up the air shocks to raise the height to normal again so the rear end doesn't bottom out.

What can happen is the compressor fails to turn on due to a blown fuse, faulty compressor or defective height sensor. If the compressor turns on the shocks might not be able to pump up due to a line leak or air shock leak.

If you are able to look at the lines or shocks you might find a problem. Otherwise going to your mechanic and have him/her inspect the system to see what the problem might be and then deside if you want to fix it or have them do the repair. Because the light turns on periodically and goes out I would suspect a leak somewhere.

Sep 05, 2010 | 2000 Cadillac Catera

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Lift sensor for rear of 1988 Deville


To begin with, check the "ride level" fuse and make sure that the ride level compressor does work, and you should be able to hear that the ride level compressor is working when the ride level system is leveling the vehicle.

The ride level system uses an air compressor and either an air type of shocks or a type of air billow to raise and lower the vehicle, there is an adjustment to set the ride height and it is located under the vehicle and there is a control lever or rod that should be connected between the rear axle and a switch that is mounted on the body of the vehicle, and there will be an adjustment slot in the control lever between the switch and the body, and that is how you would adjust the ride level height, but be sure that the vehicle can not drop any further down if someone is under the vehicle trying to adjust the ride height.

However, you might find that the control lever to the ride level has fallen off from the switch on the body or it has come loose from the rear axle, and it is just hanging there not operating the switch on the body that controls the the ride level compressor, or there might be a blown out air shock or billow, or you might find that an air line from the compressor is leaking and the ride level compressor will just run continuously until it blows out the fuse, and if that is the case you might also find out that the air compressor has burned out from running continuously.

I hope that this information will help you to solve your ride level problem.

Jun 04, 2010 | 1988 Cadillac Sedan DeVille

2 Answers

99 expedition two wheel drive passenger side goes up higher than the drivers side.uneven ride! whats a ride height sensor?


height sensor is a sensor that control air compressor on air shock.it keep vechicle level.if height sensor senses distance between frame and suspension .it will admit air to shock by controling the air compressor.check the air shock on driver side.BESURE TO TURN OFF ELECTRICAL POWER TO AIR SUSPENSION BEFORE RAISING VECHICLE.

Jul 10, 2009 | 2000 Ford Expedition

1 Answer

REPLACED DRYER ON 96 CONT NOW THE BACK WONT AIR UP FRONT DOES


maybe you got dirt in the line to the rear. Here's some background info:

The air suspension system includes the following major components:
  • Air compressor to supply air to the air springs (part of front spring and shock and rear spring and shock absorber assemblies
  • Front spring and shock (3C098) and rear spring and shock absorber (5A965) at each corner of the vehicle
  • Four linear air suspension height sensors (5359): two rear and two front height sensors to maintain the vehicle at the proper ride height; only LH rear height sensor is used for air suspension.
  • Dual-mode front spring and shock and rear shock absorber assemblies with internal actuator.
All system functions are controlled by vehicle dynamics control module (5A919). This control module receives inputs from several different sources. These inputs include:
  • vehicle speed via multiplex communication network
  • ignition switch position
  • door position via multiplex communication network
  • height sensor position
  • air suspension service switch
  • engine rpm via multiplex communication network
  • ride and steering personality settings via multiplex communications network
Communications monitor system operation and allow diagnosis of any concerns that may develop in the system.
  • System monitoring for the driver's use is provided through the instrument panel mounted message center indicator (10D898).
  • Diagnosis communication for the service technician is provided through the data link connector (14489) (DLC) under the instrument panel and Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent.
The message center indicator will display AIR LEVELING DISABLED or CHECK RIDE CONTROL if the suspension system is not turned on or the vehicle dynamics control module detects a concern. If air leveling system disabled is displayed, check that air suspension service switch is in the ON position.
-------------------------------------------------------
Weight Added When weight is added to the vehicle, the air suspension system responds as follows:
  • Air suspension height sensor length is reduced from trim length, sending a "vehicle is low" signal to the vehicle dynamics control module (5A919).
  • To restore vehicle to the trim position, the vehicle dynamics control module turns the compressor on by grounding the compressor relay control Circuit 420 (DB/Y). The relay is ground-side switched.
  • To allow pressurized air to enter the rear spring (5560) and front spring and shock (3C098), the control module opens the solenoid valves (5311).
  • Compressed air flows from the compressor, through the compressor air drier assembly, air lines and solenoid valves into the air springs.
  • As the air springs raise the body height, the air suspension height sensor (5359) increases in length until the preset trim height is reached.
  • The vehicle dynamics control module then turns off the compressor (through the relay) and closes the air spring solenoid valves.
  • ----------------------------------------------------------------------------
  • Weight Removed When weight is removed, the air suspension system responds as follows:
    • Air suspension height sensor length is increased from the trim length, sending a "vehicle is high" signal to the control module (5A919).
    • To restore the vehicle to the trim position, the vehicle dynamics control module opens the vent solenoid valve (located in the compressor assembly) and opens the solenoid valves (5311).
    • Compressed air flows from air springs, through the solenoid valves, air lines, compressor air drier (5346) and out the vent solenoid valve.
    • As the body lowers, the air suspension height sensor length decreases until the preset trim height is reached.
    • The vehicle dynamics control module then closes the vent and solenoid valves.
------------------------------------------------------------------------------
Control Module Power and Ground The vehicle dynamics control module (5A919) is located above the upper luggage compartment trim panel and lower module tray. Module power is provided by Circuit 418 (DG/Y) at Pins 36, 37, 56, 57, 58 and is powered through a Fuse 7 (30A) in power distribution box. Module ground is provided through control module wire harness Pins 6, 39, 40 and 60. The data link connector (14489) (DLC) is located in the passenger compartment under the instrument panel, 300 mm (12 inches) right of the steering column. This connector allows communications between the vehicle dynamics control module and either Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent or Rotunda Service Bay Diagnostics System (SBDS)® 001-00001 or equivalent. When the CHECK RIDE CONTROL message is displayed in the message center indicator (10D898), a system error has been detected by the vehicle dynamics control module and is stored in the control module. This diagnostic trouble code (DTC) will be retained for the next 80 ignition switch cycles. If there is no repeat of the same error during these 80 ignition switch cycles, the control module will erase the DTC. Because of this self-erasing memory, a customer may have had a concern "just a few days ago" that is not retrieved from memory when Diagnostic Test Mode (DTC) "Retrieve/Clear Continuous DTCs" is executed. This must be kept in mind if you must tell customer that no current concern has been found. When the vehicle dynamics control module detects a concern, the air suspension system is disabled for the current ignition cycle. If the condition causing the concern clears up during the current ignition switch cycle, the system will not reactivate. For example, if the customer has severely overloaded the luggage compartment, the system will not be able to trim the vehicle without exceeding the compressor run time. This will generate a DTC that disables the computer controlled suspension system. If the customer then drives the vehicle and unloads the luggage compartment without turning the ignition switch OFF, the system will not adjust for the new load. The customer will experience poor ride quality and the vehicle will not adjust trim.

May 20, 2009 | 1996 Lincoln Continental

1 Answer

Hard riding in rear


there is a sensor that reads the ride height of the car, it is called the ride height sensor, have it tested, it may be defective or not hooked up, the linkage comes off this sensor on a regular basis.

Mar 30, 2009 | 2004 Lincoln Town Car

1 Answer

Air Ride Sensors Corroded?


you buy a car with all these electronics. ride hieght sensors for each wheel. this is affecting that. then when you go to the dealership you want them to replace only the exact one piece that fails. that could take hours of diagnosis time. at damn near 100 per hour. go ahead and give them the car. let them do diag. total price 2000. or you have narrowed it down to brains or sensor. do it yourself 1000. problem solved it should cost 1000-2000 to fix. if u find parts cheaper. money in your pocket

Jan 22, 2009 | 2003 Lincoln Navigator

1 Answer

1990 Oldsmobile Ninety-Eight Regency compressor runs when car is off.


The compressor you refer to is the air suspension compressor. It provides air to adjust the ride height of the vehicle. If you will notice by looking underneath the rear of the vehicle you will notice air adjustable rear shocks, or struts. They have plastic tubing plumbed to the compressor under the hood. There is a ride height sensor for the rear of the vehicle attached from the chasis to the rear differential. Whenever the height of the rear of the car is below the threshold setting of the sensor, the system activates a relay and turns on the compressor to raise the rear of the vehicle above the minimum height specified by the manufacturer. As the vehicle ages the air envelopes of the struts loses structural integrity and seepage, or leakage develops. Some depletion of air is normal, but the compressor power supply is independent of the key position, so the compressor can run, and will run anytime the height falls below the minimum. If the car sets unattended for several days, (or weeks) the compressor can run the battery down while maintaining the minimum height. If the system leaks too much air the compressor can burn-out trying to replenish the system. If you notice the compressor runing for an extended period of time, or running too frequently you should have the system checked for the source of the leakage. (Or you can do it yourself with soapy water and a spray bottle by soaking the air bellows on the shocks or struts, and all the lines and fittings from the shocks to the compressor) If you intend to work underneath a vehicle, service stands are mandatory! DO NOT UNDER ANY CIRCUMSTANCES ATTEMPT UNDER VEHICLE SERVICE WITHOUT PROPER SERVICE STANDS IN PLACE AND STABILITY VERIFIED WITH APPROPRIATE FORCE TO PROVE THE VEHICLE CANNOT BE KNOCKED-OFF THE SERVICE STANDS!

Nov 01, 2008 | 1992 Oldsmobile Ninety Eight Regency

1 Answer

Trouble With Air Ride Thats What the Gage Inside Said, I have a ford explorer eddy bauer 1998 i turn the truck off and i hear like a strange sound from the back like a shock absorber is going down and i...


Can you hear the pump kick in when you put weight in the back and the car is running? The way it works is there is a level sensor that mounts between the body of the car and the rear axle. When weight is added in the rear the compressor will add air until the vehicle is level. When weight is taken out of the car which could be the rear passengers getting out of the car the vehicle is now higher and the pump will release air to lower the shocks back to a level height. This is why youare hearing that sound. The pump will let air out of the system even when the engine is off to maintain a level ride. If you found this solution helpful please rate it.

Thanks - Tech101

Jun 24, 2008 | 1998 Ford Explorer

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