Question about 2001 GMC Yukon XL

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How much air should be in the shocks on the auto ride system on 2001 yukon xl because the front suspention seams to be riding on the rubber bushings

Looks like the lower control arms on front of my 2001 gmc yukon xl is resting on a rubber bushing and air shock not holding it up high enough . But doesn't seem to be any leak in the auto ride system and now the rubber bushing seams to be breaking down. The compressor has been replaced but I don't think it is putting enough air in the system. What air pressure should it run at and where can you check the pressure in it.

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Posted on Jan 02, 2017

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SOURCE: 2004 yukon xl denali self-leveling rear air shocks

There's a lever that connects the driver-side rear shock to the Automatic Level Control module (the air compressor and the ride-height sensor). Disconnect the lever from the shock and rotate it up and hold it. The compressor should kick in when you hold in place after a few seconds. If it doesn't kick in, make sure your fuses and relays are good. Otherwise, you may have a failed ALC module/burned out air compressor (from the shocks being shot). After you replace the shocks (and after you recouped from the heart attack you had when you shelled out $500+ for each shock), replace the ALC module/compressor (it's all one unit), and test it - it should kick on when you rotate the lever up again.

Figure about $350 for the ALC module from your dealer, and make sure the part numbers match! Your truck came with an upgraded ALC module from the 2001-2004 module, which were prone to water damage.

Good luck!

Posted on Dec 30, 2008

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SOURCE: Auto ride on 2000 Yukon XL needs replacing.

Hey,

The air pump in located in the very back-left (driver's) side, underneath.
You know the shocks can "look" quit bad and still be okay.
Everything about this system is expensive (to me).
There is also a height sensor that can go bad and keep the air-pump from running.

I recommand an expert on this system.

Your GM Dealer is your best bet for parts.
Just my opinion.

Good Luck

Let us know,
Dave

Posted on Mar 13, 2009

  • 6 Answers

SOURCE: 2001 yukon xl with auto ride that does not engage

Hi mate, they are definetaly your sensors, if the pump is working but does not start, try, unpluging the sensor cables then plug it back in, and check whether the pump kicks is, if not check your fuses, if any is burnt.

Bestof luck

Posted on Apr 09, 2009

  • 1 Answer

SOURCE: Service Ride Control error on 2001 Yukon XL after

Try disconecting the batt for 3min careful on some GM models the radio will go into lock out Only the dealer can reprogram "NOT CHEAP" go to autozone have it scanned for free see if there is anouther problem they will not turn off the lite but tell you what the code sais after driving 20 miles the code should have reset there's likley anouther problem. take it to your mechanic have scanned if all else fails. there is no way to manualy turn off code on vehicle. pc should correct after problem is fixed.

Posted on Sep 15, 2010

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1 Answer

Where is the air compressor for the ride control on 06 gmc denail


Ride control compressors burn up because of leaking air line or shocks. Replacing compressor won't last long if you have a leak. Most of these units are mounted under floor near rear axle.

Feb 15, 2014 | 2005 GMC Yukon Xl Denali

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2007 Yukon Denali XL autoride suspension light comes on intermittently


Would need to know what DTC'S - diagnostic trouble codes are stored in the module for the autoride suspension . Hooking up a professional type scan tool ,looking at input data to the module etc... Looking at a wiring diagram an testing electrical circuit's using a DMM - digital multi-meter . Reading how the system works ,what all involved in making the system work . This is how a professional Tech would go about diagnosing this .

The automatic level control (ALC) system maintains a desired rear suspension position under all types of towing, hauling and loading conditions. The following components are involved in the operation of the ALC system:
• Air line tubing--Pressurized air from the ALC compressor is pumped to each of the rear shocks via air line tubing.
• Air drier--Pressurized air from the compressor is run through a drier containing a moisture absorbing chemical preventing water accumulation in the rear shocks.
• Compressor--Supplies pressurized air to the rear shocks
• Compressor motor relay--The relay supplies battery positive voltage to the ALC compressor motor.
• Pressure sensor--The electronic suspension control module (ESCM) module provides a 5-volt reference and low reference to the ALC pressure sensor. The module receives the signal voltage that is relative to the air pressure applied to the rear shocks.
• ESCM--Controls the ALC system and electronic suspension control (ESC) system and detects failures in both. The module monitors inputs from the position sensors, and pressure sensor to determine when to raise and lower the vehicle to trim height as the vehicle is loaded or unloaded. The module limits pump activation to 255 seconds to prevent thermal damage.
• Exhaust valve--An electric solenoid activated by the ESCM to vent air pressure from the rear shocks.
• Left and right rear suspension position sensors--The module provides a 5-volt reference and low reference to all 4 of the body-to-wheel suspension position sensors. The sensors send the ESCM a signal voltage that is relative to the rear suspension ride height
• Left and right rear shock absorbers with internal air chambers and dampers--Dampens the rear suspension and maintains trim height depending on the air pressure applied.

Nov 04, 2017 | 2007 GMC Yukon XL Denali

2 Answers

What is the ride control warning for on a 2005 yukon xl denali


It is the air shocks suspension on the rear.
When weight is added to the rear of the vehicle the ride control pump pumps up the shocks.

Feb 17, 2011 | 2005 GMC Yukon Xl Denali

1 Answer

Service ride control


It's time to replace the rear shocks. There expensive like $250.00 and up each and if your not going to be towing, most people replace them with a good set of shocks and not the factor OEM air shock which you have for the auto ride height system. If your going to just buy and good set of normal gas shocks. Pull the fuse to     the auto ride system so the light on the dash is off.
Good luck and hope this helps. The auto ride system was there for towing heavy trailers to keep the ride hight. The rear suspension is actually soft so you have a soft ride and the shock keeps it from bouncing. If your not towing heavy or carring heavy loads, you should be fine with a conventional gas shocks and you may find it better. I found the Monroe Reflex shocks to be more stable then the OEM around corners and highway driving.

May 22, 2009 | 2002 Cadillac Escalade

3 Answers

Service ride control


The fuse is called RTD 30 amp under the hoodfuse box. That is for the Air Compressor.

Parts.com has the best price for:

Rear Suspension:
Shock W/auto level control - 1500 series

and under
electrical:
then ride control components
then compressor

May 03, 2009 | 2006 GMC Yukon Xl Denali

1 Answer

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.

Mar 06, 2009 | 2003 GMC Yukon Denali

1 Answer

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mcdevito75 here, Chances are you still have the original Struts in the vehicle, have new struts installed at all 4 wheels. Shop around for a good price on Struts (shock absorbers)

Feb 24, 2009 | 2003 GMC Yukon XL

1 Answer

Auto ride on 2000 Yukon XL needs replacing.


Hey,

The air pump in located in the very back-left (driver's) side, underneath.
You know the shocks can "look" quit bad and still be okay.
Everything about this system is expensive (to me).
There is also a height sensor that can go bad and keep the air-pump from running.

I recommand an expert on this system.

Your GM Dealer is your best bet for parts.
Just my opinion.

Good Luck

Let us know,
Dave

Jan 26, 2009 | 2005 GMC Yukon Xl Denali

1 Answer

2001 yukon xl with auto ride that does not engage


Hi mate, they are definetaly your sensors, if the pump is working but does not start, try, unpluging the sensor cables then plug it back in, and check whether the pump kicks is, if not check your fuses, if any is burnt.

Bestof luck

Jan 07, 2009 | 2005 GMC Yukon Xl Denali

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