Chevrolet bulletin 24-NA-221
What it saysThis service bulletin provides service procedure information on Brake Squeal or Squeak Noise Intermittently on Initial Brake Applies. NHTSA’s full summary ↓
Chevrolet filed this with NHTSA as a service bulletin dated Nov 7, 2025, received Nov 19, 2024, about the service brakes — 2 documents under this number. It names 2 model years (2025–2026). 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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis service bulletin provides service procedure information on Brake Squeal or Squeak Noise Intermittently on Initial Brake Applies.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 24-NA-221 | Service bulletin | Nov 7, 2025 | 11025975 | PDF, 356 KB |
| 24-NA-221 | Service bulletin | Oct 8, 2024 | 11010643 | PDF, 354 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 19303310 | Canada, 193 | — | eBay Motors → |
Read by machine from the document NHTSA serves (5 pages), read Sep 30, 2026. A part number is shown only where it matches Chevrolet’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 themA 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 2 model years this bulletin names have filed 13 complaints with NHTSA since 2015.
On 3/21/2026 @ approximately 1:45 PM I was driving down a local road @ approximately 25MPH. While approaching a stop sign, I attempted to stop the vehicle, I applied the brakes and the brake pedal dropped serval inches and became hard felt like it hit the floor of the vehicle. The vehicle continued through the intersection.
2025 Chevrolet Corvette · Service Brakes · filed with NHTSA Mar 23, 2026
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 group8 other manufacturer communications filed against the Chevrolet Corvette under the same component group (service brakes), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 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. |
| 17-NA-239 | Service bulletin | Oct 9, 2024 | This bulletin provides information on possible normal brake drag caused by the vehicle parked for an extended period of time. |
| 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… |
| 17-NA-040 | Service bulletin | Nov 9, 2023 | This technical bulletin provides a procedure to apply copper paste to the brake calipers to correct a condition of Brake Squeal or Squeak No… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Chevrolet 24-NA-221 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 24-NA-221 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 24-NA-221 cover?
The manufacturer filed it against 2 model years: 2026 Chevrolet Corvette, 2025 Chevrolet Corvette. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.