GM bulletin 17-NA-239
What it saysThis bulletin provides information on possible normal brake drag caused by the vehicle parked for an extended period of time. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Oct 9, 2024, received Dec 22, 2017, about the service brakes — 4 documents under this number. It names 42 model years across Chevrolet and Cadillac (2016–2025). 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 · Cadillac.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis bulletin provides information on possible normal brake drag caused by the vehicle parked for an extended period of time.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 17-NA-239 | Service bulletin | Oct 9, 2024 | 11010562 | PDF, 130 KB |
| 17-NA-239 | Service bulletin | Oct 12, 2023 | 10244694 | PDF, 499 KB |
| 17-NA-239 | Service bulletin | Feb 6, 2023 | 10232066 | PDF, 499 KB |
| 17-NA-239 | Service bulletin | Jul 21, 2017 | 10126108 | not found |
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 25 model years
Also filed against model years this site has no page for: 2016 Chevrolet Caprice; 2017 Chevrolet Caprice; 2016 Chevrolet Caprice Police Pursuit; 2017 Chevrolet Caprice Police Pursuit.
Cadillac 17 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 38 model years this bulletin names have filed 1,532 complaints with NHTSA since 2015. 21 of them name Service Brakes — 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.
The brakes have now four times failed to stop the vehicle. When pressed they get hard, then go down to the floor and there's a pulsating feeling. The vehicle just continues to go to the floor. On the third occasion that it happened, the vehicle in a non-emergency situation, would not stop in traffic and rear-ended another vehicle.
2018 Chevrolet Corvette · Service Brakes · filed with NHTSA Jan 25, 2019
Total brake system failure. Lost almost all brake function nearly causing an accident. June 17, 2026 car was taken to dealership. Electronic Brake Control Module (EBCM), Brake Master Cylinder, Brake Pedal Retainer replacement required. August 7, 2026 received a call from dealer stating that EBCM replacement was faulty or failed.
2020 Cadillac CT4 · Service Brakes · filed with NHTSA Aug 26, 2026
Drove my car on the highway and the brakes failed. I applied all of my force to get the car to stop. This is the second time the brakes failed while driving on the highway in less than 14 months. Had it repaired the first time. It had no brake assist and a cracked pcv valve. The vacuum pump and hose to booster was replaced.
2016 Cadillac ATS · Service Brakes · filed with NHTSA Feb 23, 2021
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 service brakes
Source: same model, same component group11 other manufacturer communications filed against these GM models under the same component group (service brakes), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 24-NA-221 | Service bulletin | Nov 7, 2025 | This service bulletin provides service procedure information on Brake Squeal or Squeak Noise Intermittently on Initial Brake Applies. |
| N252494220 | Service campaign | Jun 26, 2025 | Service Update. Certain vehicles listed above may have a condition in which braking performance is reduced, vehicle top speed is limited, a… |
| 24-NA-048 | Service bulletin | Feb 6, 2025 | This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engine… |
| PIC6429B | Service bulletin | Oct 25, 2024 | This Preliminary Information communicates information on resolving noise issues related to the brakes on this vehicle. |
| 24-NA-031 | Service bulletin | Oct 9, 2024 | This service bulletin provides information for having brake pulsation and/or repeat brake pulsation. |
| 22-NA-026 | Service bulletin | Oct 8, 2024 | This service bulletin provides information for dealers/technicians on Brake Pulsation, Noise and/or Visible Pitting Condition to Brake Rotor… |
| 16-NA-059 | Service bulletin | Oct 8, 2024 | This technical bulletin provides a procedure on how to properly clean the brake calipers without damaging the paint on them for concerns reg… |
| 20-NA-229 | Service bulletin | Aug 9, 2024 | This bulletin informs dealers about the change to copper free brakes for the Camaro. |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM 17-NA-239 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 17-NA-239 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 17-NA-239 cover?
The manufacturer filed it against 42 model years across 2 brands (Chevrolet and Cadillac): 2019 Cadillac ATS, 2018 Cadillac ATS, 2017 Cadillac ATS, 2016 Cadillac ATS, 2018 Cadillac ATS-V, 2017 Cadillac ATS-V and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.