Chevrolet bulletin 20-NA-104
What it saysThis service bulletin provides information on where to look when the vehicle is experiencing the conditions of Malfunction Indicator Lamp Illuminatedâ 5V Reference, Reduced Power, Extended Crank, Body Harness to Fuel… NHTSA’s full summary ↓
Chevrolet filed this with NHTSA as a service bulletin dated Aug 7, 2024, received Jul 11, 2022, about the electrical system — 3 documents under this number. It names 9 model years (2016–2024). 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 information on where to look when the vehicle is experiencing the conditions of Malfunction Indicator Lamp Illuminatedâ 5V Reference, Reduced Power, Extended Crank, Body Harness to Fuel Tank Damage due to incorrect tire size.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 20-NA-104 | Service bulletin | Aug 7, 2024 | 11006708 | PDF, 215 KB |
| 20-NA-104 | Service bulletin | Oct 10, 2022 | 10224839 | PDF, 116 KB |
| 20-NA-104 | Service bulletin | Jun 24, 2022 | 10215625 | PDF, 101 KB |
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 9 model years this bulletin names have filed 551 complaints with NHTSA since 2015. 191 of them name Electrical System, 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 have taken this vehicle to Chevrolet dealerships approx. 8 different times due to malfunction of this vehicle. I have contacted general motors this vehicle started these problems 1 month after I purchased it when I purchased it ,it only had 95 miles on it, in the mean time due to general motors closing the case and not willing to fix…
2016 Chevrolet Camaro · Electrical System · filed with NHTSA Jun 19, 2018 · ODI 11102536
The trunk will not open. It will not open even using the keyfob, using the actual key, nor pressing the button on the driver side door. There is a constant message saying that the trunk is not secured and the car is constantly alarming because of the trunk. Unable to open the convertible top. Message says to open top manually.
2020 Chevrolet Camaro · Electrical System · filed with NHTSA Jun 26, 2024 · ODI 11596934
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
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 electrical system
Source: same model, same component group59 other manufacturer communications filed against the Chevrolet Camaro under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 22-NA-242 | Service bulletin | Apr 24, 2025 | This warranty administration bulletin provides information for dealers/technicians on System Reset and Connector Reconnect Labor Code Number… |
| 24-NA-229 | Service bulletin | Apr 10, 2025 | This bulletin provides a procedure on how to check for a battery drain utilizing the Picoscope and how to measure the load on the system tha… |
| 25-NA-087 | Service bulletin | Apr 3, 2025 | This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use for certain repairs… |
| 13-08-116-001K | Service bulletin | Mar 31, 2025 | The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for causing multiple custo… |
| 24-NA-098 | Service bulletin | Mar 21, 2025 | This service bulletin provides information for dealers/technicians on Service Programming System (SPS) Error Codes E4398, E4399, E4401, E440… |
| 23-NA-164 | Service bulletin | Mar 14, 2025 | This technical bulletin provides repair information to correct a customer concern of Vehicle Will Lock and Unlock (Active Functions Work) bu… |
| 23-NA-165 | Service bulletin | Mar 13, 2025 | This technical bulletin provides repair information to correct a customer concern of Vehicle Will Not Lock and Unlock… |
| 23-NA-163 | Service bulletin | Mar 13, 2025 | This technical bulletin provides repair information to correct a customer concern of No Crank, No Start, Quick Start/Stall, No FOB Detected… |
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 20-NA-104 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 20-NA-104 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 20-NA-104 cover?
The manufacturer filed it against 9 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.