GM bulletin 18-NA-315
What it saysThis service bulletin advises the tech to only replace the shock that is bad and not all shocks. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Apr 3, 2025, received May 1, 2025, about the suspension. It names 24 model years across Chevrolet, GMC and Cadillac (2016–2020). 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 communicationThis service bulletin advises the tech to only replace the shock that is bad and not all shocks.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 18-NA-315 | Service bulletin | Apr 3, 2025 | 11017424 | PDF, 126 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 9 model years
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 24 model years this bulletin names have filed 2,854 complaints with NHTSA since 2015. 53 of them name Suspension — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
I own a 2018 GMC Denali, Yukon XL SUV, with 67k miles. While towing our 24’ Airstream (weight 4400 lbs) the vehicle excessively bounced in the air several times on a flat pull on I-80 in Northern Ca. I took it to three mechanics who told me that the front magnetic and rear air shocks had all failed and were leaking oil.
2018 GMC Yukon · Suspension · filed with NHTSA Nov 4, 2023
The car was slowly making right hand turn when we heard a loud noise and stopped the car Once we got out, we saw that right wheel was completely torn out. We have videos and pictures. If it would happened on the higher speed, we would be dead. The car shop told us that they never seen anything like that in the past.
2018 Chevrolet Suburban · Suspension · filed with NHTSA Feb 1, 2022
Stabilitrak light comes on that also causes the engine light to come on. The vehicle self-accelerate while in park and did again when in drive. Can not tell you how fast the Rpm accelerated due to panic that the vehicle was self-accelerating but it didn’t last long. Really quick and it went back to normal idling.
2016 Cadillac XTS · Suspension · filed with NHTSA Jan 20, 2025
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 group30 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… |
| PI0281L | Service bulletin | Apr 17, 2025 | This preliminary informational (PI) bulletin provides information to dealership personnel that may be helpful when addressing underbody comp… |
| 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… |
| 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. |
| PIT6144E | Service bulletin | Feb 13, 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… |
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 18-NA-315 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 18-NA-315 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.
Which vehicles does 18-NA-315 cover?
The manufacturer filed it against 24 model years across 3 brands (Chevrolet, GMC and Cadillac): 2020 Cadillac Escalade, 2019 Cadillac Escalade, 2018 Cadillac Escalade, 2017 Cadillac Escalade, 2016 Cadillac Escalade, 2019 Cadillac XTS and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.