Chevrolet bulletin 21-NA-270
What it saysThis informational bulletin provides information for dealers/technicians on Vibration Caused by Tires. NHTSA’s full summary ↓
Chevrolet filed this with NHTSA as a service bulletin dated Oct 2, 2024, received Aug 4, 2022, about the wheels — 5 documents under this number. It names 8 model years (2019–2025). 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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis informational bulletin provides information for dealers/technicians on Vibration Caused by Tires.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 21-NA-270 | Service bulletin | Oct 2, 2024 | 11010418 | PDF, 201 KB |
| 21-NA-270 | Service bulletin | Nov 3, 2023 | 10245349 | PDF, 130 KB |
| 21-NA-270 | Service bulletin | Sep 22, 2022 | 10222805 | PDF, 70 KB |
| 21-NA-270 | Service bulletin | Aug 23, 2022 | 10219290 | PDF, 491 KB |
| 21-NA-270 | Service bulletin | Jul 26, 2022 | 10217115 | PDF, 490 KB |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 8080688 | Verify Vibration and Measure and Mark High Spot of the Wheels | 0.6 hrs |
Read by machine from the document NHTSA serves (6 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.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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 themAlso filed against model years this site has no page for: 2019 Chevrolet 6500.
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 7 model years this bulletin names have filed 4,232 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 wheels
Source: same model, same component group19 other manufacturer communications filed against these Chevrolet models under the same component group (wheels), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 25-NA-156 | Service bulletin | Jun 7, 2025 | This service bulletin provides information on Tire Sidewall Irregularities. |
| 08-03-10-006I | Service bulletin | Mar 14, 2025 | This service bulletin provides a procedure on how to clean and resurface aluminum wheel bead seats for vehicles that have the condition of T… |
| 25-NA-035 | Service bulletin | Feb 19, 2025 | This service bulletin provides information on 2024 Silverado RST Sidewinder Available (enabling all four wheels to turn in same direction… |
| 21-NA-043 | Service bulletin | Jan 31, 2025 | This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before bein… |
| 22-NA-172 | Service bulletin | Jan 23, 2025 | This technical bulletin provides repair information to correct a customer concern of Trailer Tire Pressure Only Reading Up To 100 PSI, New P… |
| 24-NA-187 | Service bulletin | Sep 12, 2024 | This informational bulletin provides information on Information on Bright PVD (Physical Vapor Deposition) Wheels Appearance and Care. |
| PIT5894C | Service bulletin | Sep 6, 2024 | This Preliminary information communicates Some customers may comment on a vibration while driving. The cause of the condition may be that… |
| 24-NA-178 | Service bulletin | Aug 30, 2024 | The informational bulletin advises that the trim beadlock is for decoration and not actual function. |
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 21-NA-270 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 21-NA-270 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 21-NA-270 cover?
The manufacturer filed it against 8 model years: 2025 Chevrolet Silverado, 2024 Chevrolet Silverado, 2023 Chevrolet Silverado, 2022 Chevrolet Silverado, 2021 Chevrolet Silverado, 2020 Chevrolet Silverado and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.