Chevrolet bulletin 17-NA-078
What it saysThis informational bulletin provides information on Corvette and Camaro ZL1 Exhaust Tone During Wide Open Throttle while in Sport or Track Modes and that this is considered a normal characteristic. NHTSA’s full summary ↓
Chevrolet filed this with NHTSA as a service bulletin dated Oct 8, 2024, received May 21, 2018, about the engine — 5 documents under this number. It names 19 model years (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.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis informational bulletin provides information on Corvette and Camaro ZL1 Exhaust Tone During Wide Open Throttle while in Sport or Track Modes and that this is considered a normal characteristic.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 17-NA-078 | Service bulletin | Oct 8, 2024 | 11010561 | PDF, 120 KB |
| 17-NA-078 | Service bulletin | Nov 9, 2023 | 10245398 | PDF, 484 KB |
| 17-NA-078 | Service bulletin | Feb 15, 2023 | 10232140 | PDF, 483 KB |
| 17-NA-078 | Service bulletin | Jul 29, 2022 | 10217075 | PDF, 65 KB |
| 17-NA-078 | Service bulletin | Mar 17, 2017 | 10138065 | 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.
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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 19 model years this bulletin names have filed 1,240 complaints with NHTSA since 2015. 108 of them name Engine — 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 2016 Chevrolet Camaro, the 13 owners who gave an odometer reading for Engine reported it at a median of 31,600 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
I am writing to report a serious safety issue I experienced with my Chevrolet Camaro, which I believe may be related to a broader mechanical defect affecting General Motors vehicles. Approximately two weeks ago, while driving on the highway, an “ESC” (Electronic Stability Control) warning suddenly appeared on my dashboard.
2024 Chevrolet Camaro · Engine · filed with NHTSA May 13, 2025 · ODI 11660777
Intermittent drivability issue involving the transmission during takeoff from a complete stop, most noticeable in heavy traffic and stop and go conditions. Vehicle shudders and lurches when accelerating from a dead stop, with a sensation similar to being hit from behind followed by abrupt engagement.
2025 Chevrolet Corvette · Engine · filed with NHTSA Feb 5, 2026 · ODI 11715879
Engine failure which required a full engine replacement. The vehicle is unmodified and the engine was replaced under warranty. The certified Chevrolet dealer that replaced the engine confirmed that the issue was the same bearing failure that is impacting the 6.2L L87 V8 engines.
2023 Chevrolet Camaro · Engine · filed with NHTSA Dec 13, 2025 · ODI 11704912
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 engine
Source: same model, same component group68 other manufacturer communications filed against these Chevrolet models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 22-NA-080 | Service bulletin | Sep 6, 2025 | This technical bulletin provides a procedure to replace the camshaft actuator magnet to correct customer concerns of engine related shudder. |
| 00-06-01-026R | Service bulletin | Jun 5, 2025 | This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage. |
| PIE0815A | Service bulletin | Jun 3, 2025 | This engineering information (EI) closure ends the need for gathering further information from technicians/field in regard to the Service En… |
| 23-NA-170 | Service bulletin | May 16, 2025 | This bulletin advises the tech to inspect deeper into what may be the main cause of an engine failure. |
| 23-NA-153 | Service bulletin | May 15, 2025 | The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is… |
| 15-NA-010 | Service bulletin | May 7, 2025 | This service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may not pass California… |
| 25-NA-100 | Service bulletin | Apr 18, 2025 | This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State who move to and regist… |
| 23-NA-115 | Service bulletin | Apr 16, 2025 | This service bulletin provides a procedure to verify the noise and align the camshaft caps to correct customer concerns of a Ticking, Tappin… |
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 17-NA-078 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-078 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 17-NA-078 cover?
The manufacturer filed it against 19 model years: 2024 Chevrolet Camaro, 2023 Chevrolet Camaro, 2022 Chevrolet Camaro, 2021 Chevrolet Camaro, 2020 Chevrolet Camaro, 2019 Chevrolet Camaro and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.