GM bulletin PIT5923C
What it saysThis Preliminary information communicates the proper component naming and labor operation codes for the air leveling system RPO F47and the Electronic Suspension Control System RPO Z95 NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Dec 5, 2024, received Dec 11, 2024, about the suspension. It names 20 model years across Chevrolet, GMC and Cadillac (2021–2025). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · GMC · Cadillac.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary information communicates the proper component naming and labor operation codes for the air leveling system RPO F47and the Electronic Suspension Control System RPO Z95
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIT5923C | Service bulletin | Dec 5, 2024 | 11011773 | PDF, 31 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themChevrolet 10 model years
Cadillac 5 model years
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 20 model years this bulletin names have filed 3,912 complaints with NHTSA since 2015.
We repeatedly received an error saying “Vehicle too high, drive with caution”, at which point, the suspension adjustment controls would not work and I could not lower the vehicle.
2022 GMC Yukon · Suspension · filed with NHTSA Jul 13, 2023 · ODI 11532172
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the suspension
Source: same model, same component group31 other manufacturer communications filed against these GM models under the same component group (suspension), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N252507500 | Service campaign | Sep 17, 2025 | Certain vehicles may have a condition in which the rear lower control arm bolts were not fully torqued. Dealers are to perform a rear wheel… |
| 25-NA-110 | Service bulletin | Sep 6, 2025 | This bulletin advises the techs that the front and or rear shocks need to be replaced as a set and not 1 at a time to avoid the road and rid… |
| 18-NA-315 | Service bulletin | Apr 3, 2025 | This service bulletin advises the tech to only replace the shock that is bad and not all shocks. |
| 24-NA-099 | Service bulletin | Mar 5, 2025 | This bulletin provides a service procedure to replace the sway bar bracket retainers if found the cause of the clunking noise from front of… |
| PIT6144F | Service bulletin | Feb 27, 2025 | This Preliminary information communicates A diagnostic tip from root causing DTC: C1197 SYM 92 caused by a pinched air inlet hose to the sus… |
| PIT5981B | Service bulletin | Feb 27, 2025 | This Preliminary information communicates a tip when diagnosing an inoperative air leveling suspension system and to repair any loss of comm… |
| 05-03-07-009L | Service bulletin | Feb 25, 2025 | This service bulletin provides information on Wheel Alignment Specifications, Requirements and Recommendations for GM Vehicles. |
| 22-NA-140 | Service bulletin | Feb 20, 2025 | This informational bulletin advises the technician of an upgraded rear coil spring if the rear sags to much from loaded equipment. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet, GMC and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM PIT5923C a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the PIT5923C repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every GM warranty extension on file lists the ones GM has filed.
Which vehicles does PIT5923C cover?
The manufacturer filed it against 20 model years across 3 brands (Chevrolet, GMC and Cadillac): 2025 Cadillac Escalade, 2024 Cadillac Escalade, 2023 Cadillac Escalade, 2022 Cadillac Escalade, 2021 Cadillac Escalade, 2025 Chevrolet Suburban and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.