How to Diagnose Air Suspension Problems - GM Vehicles
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- เผยแพร่เมื่อ 28 พ.ค. 2019
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Learn some tips for diagnosing the air suspension in your GM vehicle.
🔧 List of tools used:
• Wireless Scan Tool 1aau.to/oc/LTXAA00006
• Flashlight 1aau.to/oS/1AXAA00210
For More Info visit us at 1aau.to/h/bEq/
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I had an 02' suburban with auto ride. Had 200k miles and worked great. Recently bought another 02' with standard suspension and wish we had the auto ride back. Is there a kit to put auto ride in a suburban that doesn't have it?
Any recommendations on the 2021 Yukon Denali with air-ride and then setting up an equalizer hitch for trailer sway control? Anything special to setup so it levels out?
Currently Working on this issue myself on a 2010 denali. I picked up some shocks from you guys and an air pump. both are replaced now. wired the new pigtail into the factory harness. when i first connected the pump and cleared codes, it inflated and deflated fine. after the first time i have codes again and it wont kick on.
I have 2 codes
C0660:06 Level control exhaust valve circuit short to ground/open (which does work if i manually toggle it while they are aired up by disconnecting and reconnecting the white wire),
C0580:04 Right Front actuator circuit open. I am getting 3 ohms on the right front damper solenoid. 3 out of 4 level sensors show around 2.7v but my right front shows 1.6 which tells me i probably have high resistance on that level sensor.
all terminals are clean, no blown fuses, no corrosion. vehicle does not see any winter driving. i can jump the 30-87 pins on the ALC Relay and it will inflate just fine. this is definitely a strange system but id like to get it working properly.
my next thoughts are replacing that right front level sensor, if that doesnt work Maybe the ESC module? im not sure where else to turn but i do want to do a little more testing. i have all of the GM diag procedures at hand. any thoughts?
2011 Yukon Denali xl z55, fixed the bad front driver side strut. Service suspension system still on. Will it automatically clear. Or do I still gotta have a shop clear it?
I have 2015 Cadillac XTS the rear driver’s side higher an inch from the passenger ‘s rear side!! Any explanation?? Or recommendations! Thank you
Great video!
Went to y'all's website and I could not find that scanner
Nice review
Can you replace the Front Electronic struts with a conversion kit and kept your rear air shock ?
I hve a 1991 Buick Park Avenue that has a running motor when I turn the car off. How do I bypass the air ride so my battery stops running down? I have to replace the battery bc of this.
That link does not take you to the scan tool used in this video. They said it's no longer available in a comment way earlier
The scan tool link takes us to a cheap scan tool nothing like the one you used in the video and search reveals nothing better? Any better recommendations?
Great video. I thanks for sharing !!
I recently bought a 2014 gmc yukon denali. I'm hearing the pump go on for about 5sec every time I start up the truck, even if I turn it off for a minute then back on, you hear the pump again??
Nice video!
Good afternoon. Do u know how much PSI needs every shock..Thanks
Wow awesome 👍👏👏
Hey Andy how r u doing it’s been about 10 years since Tulley. Nice to see u again. W.D.
Wayne Things are great! Ya I miss working with you. Good times. Thanks for The comment. 😁👍
I'm chasing down a leak on the air suspension on my 2008 EXT. But on a side note damn the frame on that truck is rusted bad.
So after some research, I’m seeing that the noise upon tuning on the vehicle is normal. My question now is, is there any way to make the noise quieter?
Hello if possible please let me know what PSI these air ride suspensions run at. I disconnected my Airline and the compressor works the pressure seemed really light. Thank you
i cant talk to the electronic suspension control module with my scan tool like how u did in this video. Does this mean that its broken if so do you guys sell them pre program for my truck i have an 08 gmc yukon xl 6.2.
There is no programming for the system, some scanners allow communication with GM suspension systems, some don't. Replacing bad parts fixes most problems, though.
How can one tell which suspension the DTS has ?? I can hear pump in rear after I start a short while . Thanks !!
Typically a load leveling rear air shocks or GM RPO FE 1
I bought a 02 Escalade and t& previous owner installed air shocks in the back and the battery is slowly draining after a couple of days. I was wondering could these two be related? Any kinda of input would be appreciated.???
There is not enough detail in your comment. If it did not have factory air shocks suspension, its not clear what the other owner installed. There is a TSB on parasitic voltage draw on 2002-2006 GM vehicles. Its not a recall just a bulletin. Apparently some of the control modules in the car can develop a higher current draw. A tech has to troubleshoot to find it.
Hi is it possible to adjust my ride level on 2008 Cadillac escalade I would like for it to ride a little higher in the rear
+Tony Rollin Thanks for watching! That would require modifications to the air suspension, as the existing components are only meant to be used at predetermined heights.
What scan tool is needed for this being it’s not a typical CEL
What about the front struts? Mine are stiff -can't determine what is going on
Does your scan tool allow to turn on the pump manually?
Yeah, during the video he was able to activate air compressor using the 1A Auto Scan tool. Be advised not all scan tools can do this!
Does the same test work for cadillac xts air shocks ?
+Wasim Habib Yes you could use these same test for a Cadillac XTS!
Hi, I have a 2005 chevy suburban, the air ride pump comes on once in a while... not regularly like it use to do... I pulled the harness off yesterday, terminals were green, so I sprayed electrical cleaner over it, a few times, and blew air over it, and repeated till green was gone... air pump started at one point, but quickly shut off. There is power at this harness... is my pump bad? Or something else? It's no more than 2 years old, shocks as well... thanks! Steve
+Steve Goosney It is possible that the compressor might be bad. You can want to get it tested or looked at.
@@1AAuto take it out and bench test it would do it, I'd guess, eh?
+Steve Goosney Yes, that would work! Let us know if you have any other questions.
i was just towing my trailer and heard a pop noise.. my compressor was running very loud the last couple days now it will not raise. i suspect the compressor is leaking because it sounds like it
I feel I have a leak because recently I hear the pump go non stop and it got my attention to get it fix. Also if I have to replace the shocks which brand is the best to go. Because I heard some people say don’t go with this brand because of this 🤷🏻♂️ so which one is like the best to go would be awesome to know
Mine turns on and off through out the drive making that terrible noise . What did you do to fix it ?
1A Auto has options to keep the rear air ride suspension working using the stock ride height sensors. It's logical and 1A Auto has good support for options. Most people do this for affordability. However, some elect to pay for stock GM products to keep electronic dampening working. Very expensive. And considering some of the aftermarket options, better solutions can be found and the front shocks replaced with standard shocks that ride just fine. If the compressor, the pump is going non- stop, pull the RTD or Compressor fuses to save the pump from "burn out". Depending on the year of your vehicle, fuse options are different. Check you cars drivers manual. If the pump runs continuously you will burn the compressor pump out and its about $170 to replace that. The pump runs because their is a leak in the air system, most likely the rubber bladders at the rear shocks, but sometimes broken air lines to or from the rear shocks to the air compressor.
Just bought the shocks compressor but it doesn’t turn on I have a 2000 tahoe but they sayd that chevy made 2 different styles dont know yet but my compressor is on the passengers side middle of the truck dont know what to do
sir my tahoe 2012 car i am drive but back left tayer poo poo is speek plese help me
I changed both shocks and pump bc they was bad but still does not turn on. Unless I jump over the leads from the relay. There's no codes other then service stabilitrak and traction control lights are on the dash would those cause the system not to work
Suspension control module needs replaced
Got a question. What about if no weight but the air compressor keeps turning on? I did replace compressor and air line.
Your air shock bladders may be leaking, spray bubble soap on the air bladder and look for air leaks. Tiny bubbles reveal your next step - air shock replacement.
I have a 2003 Cadillac Escalade 2wd, 5.3L with Z55 Air Ride Suspension. At least with the 2003 you can have no codes at all and the entire suspension may be off line and no blown fuses. The air compressor was not working at all. (Key on = nothing) I replaced the air compressor first as this is where you have to begin! Reconnected battery, still no codes, but with Key on = air compressor pumped! Now with air I could test rear shocks as they inflated, I sprayed on soapy water with a spray bottle on the rubber. Both rear air shocks were leaking at the bottom of the shock rubber bladder. Replaced air shocks with new that supported electronic dampening. Still no codes. But rear air shocks inflated and rear suspension raised to proper height. Then I moved onto front electronic shocks (these have no air) replaced with new shocks. (I wanted to maintain the full Z55 electronic dampening for all 4 shocks). Not necessary to maintain electronic dampening by the way, and more expensive, but the way I wanted to go. (See other 1A Auto Videos)
Now, finally, with both of the front shocks replaced, I get a "Service Air Ride" message on my vehicles digital display! Went to O'Reilly's Part store. Free check for codes. What a joke! Their scanner is not remotely capable of doing what 1A Auto Parts scanner did in this video! A scanner that can communicate to GM products to test the air ride suspension is a MUST HAVE! Not all scanners can get the accurate data that the 1A Auto Tech and specifically GM Data the tech showed to us all! So, all I could do is remove the battery terminals to get the "Service Air Ride" message to reset.
On the 2002-2006 Cadillac Escalades and similar Tahoe's, Yukon's and Surburban's', its common to get no codes or messages at all and have no blown fuses. 2007- and up GM vehicles had greatly improved OBD2 monitoring, had more fuses assigned and better labeled and more fault code messages related to the suspension system.
I thank 1A Auto for making video's like this! 1A Auto, can you please advise on adjustment, recalibration of the ride height sensors? And more importantly too, where can I buy new replacement ride height sensors if needed? My are pretty old. Thanks !
Hi I’m currently having issues with my Escalade which fuses should be checked?
I have a 90 cadillac deville, I replaced my pump then burned out the replacement pump. Turned out the check valve went bad. It won,t close and hold the air in the system. It is a round brass fitting found latched to the side of the compressor. I haven't been able to find where I can find a replacement or if rebuild it i posible? Is there any insight you can give to help me solve the issue? Thank you.
+@v2vortex We wouldn't be able to diagnose an issue like that here, you may want to have a local mechanic take a look at it. Thanks for checking us out! 1aau.to/m/Shop-1AAuto-c
What happens if I drive with the pump not working.? Lights been on for a month now .
Like that reader sensor
Link to scan tool doesn't work any more
During a hurricane i loaded a few sand bags on my 2011 avalanche. I’ve noticed the pump doesn’t turn on any more. Do i need new pump?
+Love Pitbulls Thanks for watching! If the pump does not turn on at all and you have checked all of your relays, fuses and wiring, then yes it will have to be replaced.
1A Auto Parts thanks for the reply.
Can you tell me what your professional opinion is about my car. I have a 2014 Cadillac XTS and the rear end lowered. This started about 5 days ago. Couldn’t get it to go back up. That night went back up and drove it for 2 days and the next morning started car and heard pump come on and the car lowered and didn’t come back up till the next day around noon. No lights on my dash and I hear the pump come on every time I start the car. Checked fuses in trunk and under hood and all are good. Do you know what’s wrong?
you left out checking fuses?
greeat video
+mujjuman Thanks for the feedback!
Great video, thanks. Liked & subbed! 👍
+Dave Howard Thanks for checking us out. Shop for high quality auto parts on 1AAuto.com:
1aau.to/m/Shop-1AAuto-c
When replacing air shocks do we need to bleed them?
nope
What scan tool are you using??? I'd like to purchase it.
Did you ever find out what scan tool he used and where to purchase it? I want one as well, thank you in advance.
Yea, when you click the link it is clearly not the one he is using. Following
Can't find the scan tool used in video on web site. It only shows generic scan tool that plugs up...
+romero grady Thanks for checking us out. Shop for high quality auto parts on 1AAuto.com:
1aau.to/m/Shop-1AAuto-c
My air ride suspension is way to stiff in the rear, is there a way to adjust the shocks? The shocks seems that they are aired all the way all the time.
No. If you are using low profile sidewall height on 20 and 22" rims, you are doomed. No shock can fix that. Use the highest sidewall height profile you can get. There are different rear shock selections. If you buy a GM replacement shock, its assuming you are using 17" or 20" rims. And rear shocks can differ between rim packages. But you might find a better rear shock, but they are stiff if you are to maintain the auto rear ride height for towing or heavy rear passenger or cargo loads.
@@irish6976 is their a way to test my rear air shocks on my 2002 buick lesabre before trying to check every inch of the air lines so i know which has actually failed
Mine is saying service suspension system and service tire monitoring system was wondering what you think I should check first
Is my pump going if it makes my car sound like a diesel truck when its running???
I’ve had an issue with my 09 Escalade Hybrid for over 2 years now. I disconnected battery and got a code. Anyhow, I bought all brand new Z95 shocks and they wasn’t cheap. I put them on and my ride was still horrible. It didn’t feel like I changed anything, matter of fact they felt stiffer. Months later I bought a scan tool and checked all the wheel sensors and they all displayed values and as I lifted vehicle up and down the values changed like there supposed to. Please can someone tell me if these new shocks needed calibrated or trim set??? I’m afraid if I continue to drive like this it will damage my new shocks from the bouncing around. Any advice on why my 09 Escalade hybrid with brand new Z95 magneride shocks is still driving rough as before please send my way! Thanks to all. 🙏
Same prob, 2015 Yukon Denali. Ruff bouncy ride. Replaced front struts no difference. There is a TSB for it. Software update on the tis2.gmc website. I printed all this out. Took to dealer they basically acted like they didn't know what I was talking about. I basically handed them a color by number instruction sheet and they wouldn't do it. Told us we need front struts after we already just replaced them. This is at a dealer! I tried to get them to do the trim set as well had all of that printed out. They wouldn't do it either. Said they didn't know what I was talking about. I'm like I printed it out, from YOUR GMC website and you don't know about your on tsbs????? Going to pick it up today. Hoping to find a fix or were selling it and no more GMCs ever in my family.
Hi sir, you're right. The shop mechanic probably has no clue as to what your talking about. Basically you're requesting a recalibration of the air ride suspension system. You're actually using the tech term for calibration. An informed mechanic should know what you're requesting. I'd look for another place to go to. Good luck!
Well I have the Z55 system and I replaced with AC Delco shocks. The front shocks were rough. I had converted from stock 17" rims, to 22" rims. This type of change and tire size change, affects the vehicle ride more so than shocks. GM provides different shock types to match wheel types. 17" and 20" are the GM supported wheels for most vehicles. GM added 22" support with much later vehicles. Basically, low profile wheels, are used with tires that have narrow height profiles and these eliminate the first shock absorber, the tire itself. Try and use as high a tire sidewall height possible if you are using a 20 or 22" wheel. A higher sidewall height can absorb more road shock. Also , lower the pressure in the tires, too much air = rougher ride. But never lower than mfg minimum recommendation. If you don't like the ride with 22" rims, switch to 20" with a higher sidewall height. No one with 17" wheels complains.
what problum
Is the pump always suppose to make that noise when you turn it on ? Every single time ? Thanks
Is is been sitting for an hour or more, or probably will turn on when you start your car. Temperature changes create pressure differences.
My suburban has too much air in the rear air bags, can I bleed them then reset the computer?
+Michael James Thanks for watching! You can disconnect the air lines either at the shock or the compressor, whichever is easier. This will let air out of the system if you wish to do that.
Clicked on the for the wireless scan tool showed completely different one a wired one
My wife took our Buick Lucerne cxl for monthly service now the air suspension is like shut off please can you help me diagnose
+Carlos Gomez Thank you for watching and commenting. Unfortunately, we cannot diagnose vehicles online. Please take the car to your local mechanic for diagnosis and let us know if you need any assistance with the parts or a specific repair video.
When I'm driving I have to press all the way down on my break pedel when I'm trying to stop my car and it keeps rolling
* brake pedal
You probably need to bleed the brakes
I’m glad my 5.3 suburban doesn’t have this complex suspension system . By the way i turned out lexus gx470 due to this expensive design.
Is replacing air shocks with non air shock absorbers an option?
+Greg Obern You would need to find a kit that converts from air suspension to coil spring. Thanks for checking us out!
@@1AAuto is their a way to test my rear air shocks on my 2002 buick lesabre before trying to check every inch of the air lines so i know which has actually failed?
I replaced the compressor and the rear shocks and the compressor will not power on. I checked the fuses and they are good I pulled the relay under the hood and tested it and it clicks. I applied power to the relay connector and the compressor turns on. What is preventing the compressor from powering up on start up?
+Calvin "Caltech" Whitfield Thanks for checking us out. It would be hard to say what the cause of this is. We would recommend taking this to a mechanic to see if they are able to figure out this issue as we are not with the vehicle we cannot diagnose the connectivity issue.
@@1AAuto Thanks for the quick reply. I did take it to a mech and the fact there were no codes displayed when scanned, they were unable to determine the issue without tearing into the vehicle. and I didn't want to pay the $95 per hour charge. I will look into testing the ride height sensors next.
@@calvincaltechwhitfield2545 I’m having the same problem with my 2007 Cadillac Escalade no fault codes everything has been replaced and the pump still doesn’t come on
@@calvincaltechwhitfield2545Hey, did you ever find the solution to your compressor not working? I'm having the same problem. New compressor and shocks. Fuses good, relay good. Jumped the compressor thru the relay it works fine. Not sure what to check next, 🤔maybe my level sensor?
This could be anything depending on the year, make and model of your GM vehicle. Some 2002-2006 GM vehicles had ignition switches that work to start the car, but fail to start some sub systems due to the ignition switch wear and tear.
Some fuses not labeled to the suspension system were combined on 2002-2006 model years with other engine or instrumentation support. Later vehicles 2007 and up did a much better job of separating suspension fuses, providing both a RTD fuse and a compressor only fuse. So start by check all fuses on the vehicle. Yes, a ride height sensor could be bad, but you have different sensors for all 4 wheels. The compressor will still activate. Usually, if the compressor does not activate, its the compressor itself.
However, GM trucks are notorious for bad grounds. Sometimes the various grounding points under the chassis get corroded and present a higher resistance to ground and some sub systems won't operate correctly, or at start up. If you own an older GM vehicle, (I have a 2003 Escalade) search out the grounding points under the hood and under the chassis and clean them up. Easy to do. The suspension is covered in years of mud, salt or snow. Its maintenance.
Those Tahoe’s come with a air suspension? Didn’t know that
Yes the Yukons too its on the higher trim levels the Z55 is one of the air ride systems
There is the Z55 and Z95 system packages that affect all 4 wheels with automatic dampening and air shocks on the rear, and ride sensors on all 4 wheels. Then GM had packages that were air shocks for just the rear wheels, and standard shocks for the front. Check inside your glove box, a list of codes will be there, that is all of the standard and special packages that GM installed on your vehicle. Look up each of those codes.
Great video on how to use a scan tool. Question though does the scan tool turn change the parts for you? Since you are so reliant on it?
What an uninformed comment
Clicked on link for the wireless code reader. Didn't take me to that reader.
The reason I watched the video is because my 2019 Cadillac Escalade ESV Platinum rides worse that a unsuspended hay wagon back on the farm. New tires properly inflated per the door sticker. Cadillac Dealer says all is well, I told him it's horrible ride.
Where can i buy that scan tool ??
Should the compressor come on everytime you start the vehicle, even without load?
Yes, it levels it out everytime.
cadillac xts 2014 front struts
+Marcus Stallworth We do not have a video for this repair right now, but we'll keep this request in mind for a future video! 1AAuto.com
That frame will turn to rust powder before anything else lol.
+334 TRAX Thanks for checking us out! 1AAuto.com
Go to Mexico and you’ll see all the old American trucks doing fine and the Japanese ones rusted out
My battery got drained cuz the alternator went bad now my car Is low only in the rear The airbags in the rear will rise the car But when I cut off the car or go past 40 miles per hour the car will go back down in the rear not the front
+A C. Thanks for the feedback!
That’s a solenoid on top of the shock, not a sensor.
tell me sir
Step 1. Buy wireless scanner tool 🙄
Not all of these don't have money to buy high-dollar equipment.
Waaaaaaaaay too wordy
Great video!
Is this scan tool still available? The links don't work and it's not showing anywhere on your site from what I can tell..
+lynchburger777 The exact scan tool in the video is no longer available. The link below will bring you to all the scan tools that we carry. Thanks for watching!
www.1aauto.com/search?q=scan+tool
Just checked and all the scan tools are out of stock on their site lol. Amazon here I come!
What was the brand and model number for the scan tool? U dont have anything used I as a scan tool in your website now