Air suspension issue

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mq019

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Hey guys -

I'm out on a road trip for vacation with my family and running into an issue with the air ride suspension.

A couple of days ago it quit responding at all - any time I try to adjust the ride height, it shows a message on the DIC that says it's "unavailable".

There are no codes (I checked). I have shut down and restarted the car multiple times. I've tried it parked, moving slowly, etc etc.

The truck is level and sitting at the normal ride height, but will not raise. I haven't tried lowering it because I don't want it to lower then not be able to raise back up.

It had been working earlier on our trip. I was able to raise the ride height when off-road, and was able to lower it to get lowest setting to get it in a parking garage. Just within the last couple of days it's refused to do anything.

Anyone have any ideas or should I just wait it out until I get home next week and can take it to my dealer?


Thanks!
 

Kpwweb

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You might try pulling the fuse for it, or at most disconnecting the battery for a little while. Otherwise I would wait it out until you get home.

What year is the truck and how old/what condition is the battery?
 
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mq019

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You might try pulling the fuse for it, or at most disconnecting the battery for a little while. Otherwise I would wait it out until you get home.

What year is the truck and how old/what condition is the battery?
Thanks - I'll take a look at the fuse this morning.

It's a 2025 Yukon XL AT4U 3.0 - about a month old.
 

Stbentoak

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A vehicle that's that new should go to the dealer immediately. I wouldn't screw with anything trying to fix it. There are always a few new build glitches in the first six months of ownership. Mostly once those get ironed out these vehicles turned out to be pretty dependable. My air suspension has worked flawlessly for four years straight, no reason years won't either once fixed.
 
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mq019

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A vehicle that's that new should go to the dealer immediately. I wouldn't screw with anything trying to fix it. There are always a few new build glitches in the first six months of ownership. Mostly once those get ironed out these vehicles turned out to be pretty dependable. My air suspension has worked flawlessly for four years straight, no reason years won't either once fixed.
Yeah - I'll definitely get it in as soon as I get back when it goes in for it's first oil change. Was just wondering if there was something dumb that I was missing.

I'm not super worried about it. Shocks/bags are holding air, so they're good as is for me to finish the trip, and no codes so shouldn't be a huge deal. I figure they'll get it sorted out once I'm home.

Thanks!
 

Joseph Garcia

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Yes, if disconnecting the battery negative cable for 10 minutes does not reset and fix the issue, then forget about it and finish your vacation. Then, take it to the dealer after you return home.
 

WalleyeMikeIII

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What drive mode are you in?
Certain ride heights are not available in all drive modes. For instance, you cannot go into “Increased” ride height when in tow/haul mode. And you can only go to Max ride height in 4Low. Also, if the load comes the vehicle is too much, you cannot go above normal. Speed is also a factor.

Attached are screen shots from owners manual.
 

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alpha_omega

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What drive mode are you in?
Certain ride heights are not available in all drive modes. For instance, you cannot go into “Increased” ride height when in tow/haul mode. And you can only go to Max ride height in 4Low. Also, if the load comes the vehicle is too much, you cannot go above normal. Speed is also a factor.

Attached are screen shots from owners manual.
Second this comment. If this isn’t your issue. Off to the stealership. No reason it should have issues already.
 

BacDoc

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Second this comment. If this isn’t your issue. Off to the stealership. No reason it should have issues already.
Stealership?

Are you implying they brag about customer service but try to charge the highest price they can get for the sale, and if you have problems, it’s like pulling teeth just to get someone to respond?

They never do that! Do they? LOL

Seriously some are not bad and the one I use is pretty good. I know things have gotten expensive but when you consider the price we pay for these trucks. customer service should be a priority !
 

2024 White Tahoe

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Yes, if disconnecting the battery negative cable for 10 minutes does not reset and fix the issue, then forget about it and finish your vacation. Then, take it to the dealer after you return home.


Disconnecting the negative battery cable MAY erase any stored trouble codes, preventing the dealer from properly diagnosing the issues.
 
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mq019

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What drive mode are you in?
Certain ride heights are not available in all drive modes. For instance, you cannot go into “Increased” ride height when in tow/haul mode. And you can only go to Max ride height in 4Low. Also, if the load comes the vehicle is too much, you cannot go above normal. Speed is also a factor.

Attached are screen shots from owners manual.
I'm tracking all.of this - I've used the leveling system multiple times both higher when off-road and lower when in a parking garage. It won't work in any of situations where it was working before, so it's not an issue with the vehicle configuration.

Also, I believe it will actually tell you in the warning message if it can't raise the vehicle due to tow-haul mode.
 
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mq019

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So just an update in case anyone else runs into this - I think I found the problem.

Got home yesterday, and everything has been working without any issues today.

Thinking about it, I think what happened was that there is probably some type of weight or pressure sensor, and with 4 people and the truck fully loaded, it either couldn't, or wouldn't raise the truck. I suspect that if I had lowered it, it would have come back to the "normal" position without any issue, but it wouldn't go higher than that due to the weight.

As soon as I unloaded everything from the trip, its been working fine. I believe payload capacity for the truck is around 1250lbs. and doing some quick math in my head, we were probably closer to 1700lbs. passengers/cargo


GM should really update the message in the DIC to provide a little more information - would be trivial to add a message that says something about too much weight to increase ride height, or something to that effect instead of just saying "system is unavailable".
 

WalleyeMikeIII

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So just an update in case anyone else runs into this - I think I found the problem.

Got home yesterday, and everything has been working without any issues today.

Thinking about it, I think what happened was that there is probably some type of weight or pressure sensor, and with 4 people and the truck fully loaded, it either couldn't, or wouldn't raise the truck. I suspect that if I had lowered it, it would have come back to the "normal" position without any issue, but it wouldn't go higher than that due to the weight.

As soon as I unloaded everything from the trip, its been working fine. I believe payload capacity for the truck is around 1250lbs. and doing some quick math in my head, we were probably closer to 1700lbs. passengers/cargo


GM should really update the message in the DIC to provide a little more information - would be trivial to add a message that says something about too much weight to increase ride height, or something to that effect instead of just saying "system is unavailable".
Excessive Vehicle Loading listed in the owners manual as a reason for the Unavailable message (see 1st Screen Shot posted in post #7). However I agree w/ you that a message update saying "Vehicle Load Too High to Raise Vehicle" would be better than "unavailable."
 

Eighthtry

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One thing to consider with your problem.

First, I have no problems with my air suspension. 2023 GMC Yukon Denali XL. I like it. The wife (her Car) likes it. But let me tell you a little story you might think about.

So, about to leave for a road trip. 23,000 miles on the Yukon. Tire wear is normal. Suspension up and down just like it should be. I have this bright idea to take it to my dealership to have it aligned. My brilliance never ceases to amaze me.

Got it back. It had the changes/new specs on this piece of paper with red and green on it. Wow, it really needed an alignment. Feeling good. Load up and go. Staying in Lanett, Alabama because hotels are sold out in in Auburn. It was graduation weekend. I never had any idea that they graduated people at Auburn.

We check into a Hilton property in Lanett, about 30 minutes away, and head to Auburn, Alabama for dinner.

I come out from dinner. I had parked with the front wheels turned left. I looked down and there was nothing but cord showing on the inside of the left tire. I go check the right side. Same problem. I am not driving this Yukon another foot.

Call GMC help desk. There is actually a dealership in Lanett. Me, the wife, and the tow truck set out on an adventure to Lanett, which happens to have.... a GMC dealer? That goes along with the incredible fact that there are real graduates from Auburn, but sure enough.....

We dump it on the lot and the wrecker driver takes us to whatever Hilton property we were staying in.

The next morning I get up and hitch a ride with the front desk clerk's sister, who stopped by for the free breakfast. She was driving something like a 2005 Yugo with 2.4 million miles on it. It was full of fast food boxes, cups, dirty clothes, dog hair, and no telling what else. She took me to the dealer about 20 minutes away. I extricated myself out of that thing, gave her $20, and thanked her for the help. She was actually a nice girl, but coyote ugly.

This dealership is tiny. Two bays plus tire storage. I check in with the service department, tell them the story, he says he knows the problem but lets go out and look at it.

"Yep, we can get it aligned, put two tires on it, and have it out in two hours." Hell of a deal.

I sit around and read the tractor reviews out of a tractor magazine in what some might call a lounge. They keep me updated on the progress. First, the dealership did not have an alignment machine, so they sent it down the street to Junior's with two new tires to have it aligned. He did so and gave me the same red and green specs on the changes he had to make. Turned out old Junior knew exactly what he was doing.

The dealer got it back, spiffed it up, I wrote the check, he handed me the keys, and I said thank you.

Then I turned and asked what happened? He said the guy doing the alignment in Rockwall, TX FAILED to read the owner's manual. I forget the page number, but sure enough there is a small section that gave instructions on how to align a truck with air suspension.

I then asked him how he came to know that. He said Junior had FAILED to read the owners manual last week when he did an alignment for a dealership customer.

I asked him for some help in assembling the info I needed for my soon to be upcoming visit with my service manager in Rockwall. He already had it together, including the copy of section something, page who knows, of the owners manual.

Anyway, we continued our trip to the Finger Lakes region in New York to visit the McKenzie Childs Pottery Factory, which makes the ugliest damn pottery in the civilized world. I challenge someone to find anything uglier. And we have plenty of it.

When we arrived back home I took my packet, plus the sheet detailing the alignment specs my dealer supplied when he did it, and promptly received a check for $700, which was about right.

The morals of the story? First, make damn sure your alignment store has an owners manual with the correct procedures and provides you the printed final sheet specs. Then put it in your glove box and lock it so you don't lose it, and remember to have that specific discussion with the service writer, inluding section and page number noted. Second, make damn sure you remember you now have an independent rear axle on your truck. I didn't even think of that and I knew it. The rear tires turned out to be worn, just not to the extent the fronts were. I put another 10,000 miles on them before I replaced, which probably broke me even with my settlement.

All in all, it only cost me 3 or so hours out of my trip and a basic breakeven on money out-of-pocket. And now I have the same knowledge that Junior had to learn the hard way and my Rockwall service manager had to learn the hard way burned into what is left of my brain.

It still makes me giggle, although it could have been a front tire blowout at 70 mph.

Anyone else encountered this?
 

olyelr

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One thing to consider with your problem.

First, I have no problems with my air suspension. 2023 GMC Yukon Denali XL. I like it. The wife (her Car) likes it. But let me tell you a little story you might think about.

So, about to leave for a road trip. 23,000 miles on the Yukon. Tire wear is normal. Suspension up and down just like it should be. I have this bright idea to take it to my dealership to have it aligned. My brilliance never ceases to amaze me.

Got it back. It had the changes/new specs on this piece of paper with red and green on it. Wow, it really needed an alignment. Feeling good. Load up and go. Staying in Lanett, Alabama because hotels are sold out in in Auburn. It was graduation weekend. I never had any idea that they graduated people at Auburn.

We check into a Hilton property in Lanett, about 30 minutes away, and head to Auburn, Alabama for dinner.

I come out from dinner. I had parked with the front wheels turned left. I looked down and there was nothing but cord showing on the inside of the left tire. I go check the right side. Same problem. I am not driving this Yukon another foot.

Call GMC help desk. There is actually a dealership in Lanett. Me, the wife, and the tow truck set out on an adventure to Lanett, which happens to have.... a GMC dealer? That goes along with the incredible fact that there are real graduates from Auburn, but sure enough.....

We dump it on the lot and the wrecker driver takes us to whatever Hilton property we were staying in.

The next morning I get up and hitch a ride with the front desk clerk's sister, who stopped by for the free breakfast. She was driving something like a 2005 Yugo with 2.4 million miles on it. It was full of fast food boxes, cups, dirty clothes, dog hair, and no telling what else. She took me to the dealer about 20 minutes away. I extricated myself out of that thing, gave her $20, and thanked her for the help. She was actually a nice girl, but coyote ugly.

This dealership is tiny. Two bays plus tire storage. I check in with the service department, tell them the story, he says he knows the problem but lets go out and look at it.

"Yep, we can get it aligned, put two tires on it, and have it out in two hours." Hell of a deal.

I sit around and read the tractor reviews out of a tractor magazine in what some might call a lounge. They keep me updated on the progress. First, the dealership did not have an alignment machine, so they sent it down the street to Junior's with two new tires to have it aligned. He did so and gave me the same red and green specs on the changes he had to make. Turned out old Junior knew exactly what he was doing.

The dealer got it back, spiffed it up, I wrote the check, he handed me the keys, and I said thank you.

Then I turned and asked what happened? He said the guy doing the alignment in Rockwall, TX FAILED to read the owner's manual. I forget the page number, but sure enough there is a small section that gave instructions on how to align a truck with air suspension.

I then asked him how he came to know that. He said Junior had FAILED to read the owners manual last week when he did an alignment for a dealership customer.

I asked him for some help in assembling the info I needed for my soon to be upcoming visit with my service manager in Rockwall. He already had it together, including the copy of section something, page who knows, of the owners manual.

Anyway, we continued our trip to the Finger Lakes region in New York to visit the McKenzie Childs Pottery Factory, which makes the ugliest damn pottery in the civilized world. I challenge someone to find anything uglier. And we have plenty of it.

When we arrived back home I took my packet, plus the sheet detailing the alignment specs my dealer supplied when he did it, and promptly received a check for $700, which was about right.

The morals of the story? First, make damn sure your alignment store has an owners manual with the correct procedures and provides you the printed final sheet specs. Then put it in your glove box and lock it so you don't lose it, and remember to have that specific discussion with the service writer, inluding section and page number noted. Second, make damn sure you remember you now have an independent rear axle on your truck. I didn't even think of that and I knew it. The rear tires turned out to be worn, just not to the extent the fronts were. I put another 10,000 miles on them before I replaced, which probably broke me even with my settlement.

All in all, it only cost me 3 or so hours out of my trip and a basic breakeven on money out-of-pocket. And now I have the same knowledge that Junior had to learn the hard way and my Rockwall service manager had to learn the hard way burned into what is left of my brain.

It still makes me giggle, although it could have been a front tire blowout at 70 mph.

Anyone else encountered this?
Anybody doing an alignment on an air suspension vehicle who doesnt know there are special procedures required for it, just simply dosnt know what they are doing. Period.

And unfortunately, there are many of those types of people out there.

Nice book by the way…you are a great writer lol
 

Joseph Garcia

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One thing to consider with your problem.

First, I have no problems with my air suspension. 2023 GMC Yukon Denali XL. I like it. The wife (her Car) likes it. But let me tell you a little story you might think about.

So, about to leave for a road trip. 23,000 miles on the Yukon. Tire wear is normal. Suspension up and down just like it should be. I have this bright idea to take it to my dealership to have it aligned. My brilliance never ceases to amaze me.

Got it back. It had the changes/new specs on this piece of paper with red and green on it. Wow, it really needed an alignment. Feeling good. Load up and go. Staying in Lanett, Alabama because hotels are sold out in in Auburn. It was graduation weekend. I never had any idea that they graduated people at Auburn.

We check into a Hilton property in Lanett, about 30 minutes away, and head to Auburn, Alabama for dinner.

I come out from dinner. I had parked with the front wheels turned left. I looked down and there was nothing but cord showing on the inside of the left tire. I go check the right side. Same problem. I am not driving this Yukon another foot.

Call GMC help desk. There is actually a dealership in Lanett. Me, the wife, and the tow truck set out on an adventure to Lanett, which happens to have.... a GMC dealer? That goes along with the incredible fact that there are real graduates from Auburn, but sure enough.....

We dump it on the lot and the wrecker driver takes us to whatever Hilton property we were staying in.

The next morning I get up and hitch a ride with the front desk clerk's sister, who stopped by for the free breakfast. She was driving something like a 2005 Yugo with 2.4 million miles on it. It was full of fast food boxes, cups, dirty clothes, dog hair, and no telling what else. She took me to the dealer about 20 minutes away. I extricated myself out of that thing, gave her $20, and thanked her for the help. She was actually a nice girl, but coyote ugly.

This dealership is tiny. Two bays plus tire storage. I check in with the service department, tell them the story, he says he knows the problem but lets go out and look at it.

"Yep, we can get it aligned, put two tires on it, and have it out in two hours." Hell of a deal.

I sit around and read the tractor reviews out of a tractor magazine in what some might call a lounge. They keep me updated on the progress. First, the dealership did not have an alignment machine, so they sent it down the street to Junior's with two new tires to have it aligned. He did so and gave me the same red and green specs on the changes he had to make. Turned out old Junior knew exactly what he was doing.

The dealer got it back, spiffed it up, I wrote the check, he handed me the keys, and I said thank you.

Then I turned and asked what happened? He said the guy doing the alignment in Rockwall, TX FAILED to read the owner's manual. I forget the page number, but sure enough there is a small section that gave instructions on how to align a truck with air suspension.

I then asked him how he came to know that. He said Junior had FAILED to read the owners manual last week when he did an alignment for a dealership customer.

I asked him for some help in assembling the info I needed for my soon to be upcoming visit with my service manager in Rockwall. He already had it together, including the copy of section something, page who knows, of the owners manual.

Anyway, we continued our trip to the Finger Lakes region in New York to visit the McKenzie Childs Pottery Factory, which makes the ugliest damn pottery in the civilized world. I challenge someone to find anything uglier. And we have plenty of it.

When we arrived back home I took my packet, plus the sheet detailing the alignment specs my dealer supplied when he did it, and promptly received a check for $700, which was about right.

The morals of the story? First, make damn sure your alignment store has an owners manual with the correct procedures and provides you the printed final sheet specs. Then put it in your glove box and lock it so you don't lose it, and remember to have that specific discussion with the service writer, inluding section and page number noted. Second, make damn sure you remember you now have an independent rear axle on your truck. I didn't even think of that and I knew it. The rear tires turned out to be worn, just not to the extent the fronts were. I put another 10,000 miles on them before I replaced, which probably broke me even with my settlement.

All in all, it only cost me 3 or so hours out of my trip and a basic breakeven on money out-of-pocket. And now I have the same knowledge that Junior had to learn the hard way and my Rockwall service manager had to learn the hard way burned into what is left of my brain.

It still makes me giggle, although it could have been a front tire blowout at 70 mph.

Anyone else encountered this?
Thank you for your entertaining story. I had more than a few good chuckles, as I read it.

Please consider re-phrasing your thread title to something that relates to the solution of your tire issue, in order to warn folks about this potential issue (you know, like "Has the Dealer Read You Owners Manual Before Giving Your Truck an Alignment"), just to put this chit in folks minds.

I agree with @olyelr that any shop that performs alignments SHOULD know about the vehicle that they are aligning, but as we all know, that just does not exist everywhere anymore.
 

Eighthtry

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Thank you for your entertaining story. I had more than a few good chuckles, as I read it.

Please consider re-phrasing your thread title to something that relates to the solution of your tire issue, in order to warn folks about this potential issue (you know, like "Has the Dealer Read You Owners Manual Before Giving Your Truck an Alignment"), just to put this chit in folks minds.

I agree with @olyelr that any shop that performs alignments SHOULD know about the vehicle that they are aligning, but as we all know, that just does not exist everywhere anymore.
It looks like your wheels are stock, so this is the reason for the question. Did you have encounter any problems with those 305's being too wide for the wheel? It does not look from the pictures that there is too much overhang on the wheels, so I am thinking maybe they are 9-10" wide?

Great job on the supercharger. I would love to have an Escalade V. I had the same type on my 2010 CTS V and my 2018 Z06 They are fun.
 

Joseph Garcia

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It looks like your wheels are stock, so this is the reason for the question. Did you have encounter any problems with those 305's being too wide for the wheel? It does not look from the pictures that there is too much overhang on the wheels, so I am thinking maybe they are 9-10" wide?

Great job on the supercharger. I would love to have an Escalade V. I had the same type on my 2010 CTS V and my 2018 Z06 They are fun.
Yes, my wheels are stock with the 8.5" width and 31mm offset. I did call Michelin before purchasing the 305's and asked them about the 8.5" rim, and they said that it would work fine for their tire (at the low limit, but still within it). I still have about 1/4" clearance with the truck's body at the narrowest point, so no rubbing.

Yes, I think that a 9" wheel width would fill out the tire a bit more, but I don't know what the impact would be on truck body clearances.

And, yes, the supercharger is tons of fun.
 

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