GM bulletin 23-NA-018
What it saysThis bulletin provides a procedure to correct a customer concern that while driving at low speeds, the rear wheels lock up, causing vehicle to come to a stop as if the brakes were applied or the vehicle was shifted into… NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Jun 22, 2023, received Jul 12, 2023, about the service brakes. It names 4 model years across Chevrolet and GMC (2019–2020). 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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis bulletin provides a procedure to correct a customer concern that while driving at low speeds, the rear wheels lock up, causing vehicle to come to a stop as if the brakes were applied or the vehicle was shifted into park.
Trouble codes it names: P2724 P2727 P2729 all 3 read from the document itself; NHTSA’s summary names none
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 23-NA-018 | Service bulletin | Jun 22, 2023 | 10239086 | PDF, 492 KB |
What the document itself lists
The manufacturer titles it “Rear Wheels Lock Up While Driving At Low Speeds Feels Like The Brakes Applied Or”.
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 24043411 | Page 2 June, 2023 Bulletin No.: 23-NA-018 | — | eBay Motors → |
Read by machine from the document NHTSA serves (2 pages), read Sep 30, 2026. A part number is shown only where it matches GM’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 2 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 4 model years this bulletin names have filed 3,030 complaints with NHTSA since 2015. 1,298 of them name Power Train, 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.
On the 2019 Chevrolet Silverado, the 122 owners who gave an odometer reading for Service Brakes reported it at a median of 8,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The first issue is a bluetooth issue. The phone volume goes silent when I get in my vehicle. If I connect to car play, it works. I have missed important calls due to this issue. This started in july of 2019 and its not fixed yet. GM says it apple. Apple says its GM I do not care just fix it. Second see below images. You know the issue.
2019 GMC Sierra · Service Brakes · filed with NHTSA Feb 19, 2020 · ODI 11310027
Vehicle lost engine power on the road. Light display came on stating engine reduce power. It would not pull the trailer. Had to pull over and the display went away only to appear again later. We brought vehicle to chevrolet dealer . The part needed to hopefully fix is on backorder. There is also recall with no available remedy.
2020 Chevrolet Silverado · Service Brakes · filed with NHTSA Jul 10, 2025 · ODI 11672450
Brand new truck with only 450 miles. First incident was check engine light came on , brake pedal was really hard to press almost hit car infront of me. Second incident all lights came back up abs,srs, trailer brake module, parking brake, truck will not go faster than 42mph. And brake pedal was really hard again.
2020 Chevrolet Silverado · Service Brakes · filed with NHTSA May 5, 2020 · ODI 11323426
In depth: 2020 Chevrolet Silverado transmission and drivetrain problems → · 2020 Chevrolet Silverado brake problems → · 2019 Chevrolet Silverado transmission and drivetrain problems → · 2019 Chevrolet Silverado brake problems →
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 group28 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 |
|---|---|---|---|
| 25-NA-264 | Service bulletin | Sep 3, 2025 | This informational bulletin provides information on Automated Brake Bleed and/or Brake Hydraulic Test procedure fails when attempting to per… |
| 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… |
| PIT5828D | Service bulletin | Jan 9, 2025 | This Preliminary Information communication provides information to the technician about customers that may request the factory Integrated Tr… |
| PIT6134G | Service bulletin | Jan 7, 2025 | This Preliminary information communicates an issue with premature brake pad life and engineering is working on release new pad lining materi… |
| 24-NA-073 | Service bulletin | Jan 3, 2025 | This technical bulletin provides a procedure to inform drivers that under certain driving conditions such as hilly or mountainous roads acco… |
| PIT6134F | Service bulletin | Dec 19, 2024 | This Preliminary information communicates an issue with premature brake pad life and engineering is working on release new pad lining materi… |
| 24-NA-045 | Service bulletin | Dec 19, 2024 | This informational bulletin provides information on Pop/Creak Type Noise While Sitting Stationary and Turning Steering Wheel with Brakes App… |
| PIT6134E | Service bulletin | Nov 15, 2024 | This Preliminary information communicates an issue with premature brake pad life and engineering is working on release new pad lining materi… |
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 GMC, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM 23-NA-018 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 23-NA-018 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 23-NA-018 cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and GMC): 2020 Chevrolet Silverado, 2019 Chevrolet Silverado, 2020 GMC Sierra, 2019 GMC Sierra. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.