Occasional "Service Leveling System" Messages

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pTahoe

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Hi All.
My 2024 Tahoe is the Z71 with the air suspension; California car owned new since 11/2024 but only about 5,000 miles and has been garaged most of the time.
I have searched the forum about the "Service Leveling System" message, and I see some random accounts of it but not really any conclusive solutions.
I am curious how often folks see this.
It happened to me about a month ago, and it was convenient for me to finish my drive and then the message did not come back upon the next restart.
Happened again earlier this week. While driving, I tried adjusting the suspension and received a message about the system being unavailable, and then a little while later a new message popped up about proceeding with caution because the suspension was too high. It didn't seem too high, but I did not get out and check. On the next start, everything was fine.
In both cases, there were no unusual conditions (high weight, rough road, hot/cold weather).
Yesterday (just a few restarts after the issue), I took it to the dealer for a simple oil change and had them read the codes, but they found no problems, codes, or history of issues.
THIS is troubling, because there was clearly a problem message and I find it hard to believe the system does not log it somehow.
The air suspension generally works nicely, but I am aware of the added complexity of potentiometer/height sensors at each corner, airbags, pump, valves, tubing, and so forth.
So do other owners randomly receive these messages, and do they typically resolve themselves?
Any true solutions identified; perhaps loose connectors (not very likely) or stuck valves?
Disconnecting the battery is not a solution, and really not much of a useful diagnostic.
This car is new so I don't need to do smog checks yet but in a few years I will need to have it smogged, and disconnecting the battery causes the ready flags to go away, and they can be problematic to re-set.
Curious to hear from the greater owner community if people see this issue much, and perhaps don't post about it?
Thanks!
 

Fless

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My advice would be to have the code read by a capable scanner when the message shows. Keep the engine running so the code doesn't disappear.
 

ReaperHWK

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Weird. I know in my scanner of a code shows and then resolves itself there is a “history” of codes that should be stored as a log. Is the dealer incompetent?
 

Joseph Garcia

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That visit to the dealer is indeed suspicious. To my knowledge, whenever a dash warning light comes on, a trouble code is generated and stored in EPROM memory, until deleted.
 

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