GM bulletin PIT6175
What it saysThis Preliminary information communicates an issue on a Thump, Chatter, Vibration, Rumble, Rattle type noise from the rear suspension when going over a dip in the road as the suspension compresses and rebounds. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Aug 13, 2024, about the suspension. It names 4 model years across Chevrolet, GMC and Cadillac (2024). 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.
Get the next GM bulletin for your model by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
This Preliminary information communicates an issue on a Thump, Chatter, Vibration, Rumble, Rattle type noise from the rear suspension when going over a dip in the road as the suspension compresses and rebounds. Dealers are to inspect the rear suspension accelerometer sensor part numbers to verify they are correct
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIT6175 | Service bulletin | Aug 13, 2024 | 11006306 | PDF, 216 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 2 model years
GMC 1 model year
Cadillac 1 model year
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Email me new GM bulletins for one of these models
A weekly email, sent only in a week when GM files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 4 model years this bulletin names have filed 369 complaints with NHTSA since 2015.
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 PIT6175 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 PIT6175 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 PIT6175 cover?
The manufacturer filed it against 4 model years across 3 brands (Chevrolet, GMC and Cadillac): 2024 Cadillac Escalade, 2024 Chevrolet Suburban, 2024 Chevrolet Tahoe, 2024 GMC Yukon. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.