Chevrolet bulletin 23-NA-157
What it saysThis service bulletin provides repair information to correct a customer concern of a Malfunction Indicator Lamp (MIL) illuminated in Driver Information Center (DIC), a Reduced Propulsion message, and charging limited… NHTSA’s full summary ↓
Chevrolet filed this with NHTSA as a service bulletin dated Apr 3, 2025, received Oct 7, 2023, about the electrical system — 2 documents under this number. It names 6 model years (2020–2023). 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 repair information to correct a customer concern of a Malfunction Indicator Lamp (MIL) illuminated in Driver Information Center (DIC), a Reduced Propulsion message, and charging limited to 30% State of Charge (SOC).
Trouble codes it names: U3620 U3622 U3624 U3626 U3628 U362A U362C U362E U3630 U3632 U3634 U3636 all 12 read from the document itself; NHTSA’s summary names none
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 23-NA-157 | Service bulletin | Apr 3, 2025 | 11017517 | PDF, 862 KB |
| 23-NA-157 | Service bulletin | Sep 8, 2023 | 10243719 | PDF, 135 KB |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 2883188 | Verify Battery Identification Number and Latest Hybrid Powertrain Control Module 2… | 0.3 hrs |
Read by machine from the document NHTSA serves (7 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 6 model years this bulletin names have filed 505 complaints with NHTSA since 2015. 269 of them name Electrical System, Fuel/Propulsion System — 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.
This is a comment on an existing open recall (nhtsa chat said to use this form). Related to the Chevy Bolt recall 21V650. The diagnostic software will be designed to detect specific abnormalities that might indicate a damaged battery in Bolt EVs and EUVs by monitoring the battery performance; alerting customers of any anomalies; and…
2020 Chevrolet Bolt EV · Fuel/Propulsion System · filed with NHTSA Sep 24, 2021
The contact owns a 2022 Chevrolet Bolt EV. The contact received notification of NHTSA Campaign Number: 21V650000 (Electrical System) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair.
2022 Chevrolet Bolt EV · Electrical System · filed with NHTSA Sep 6, 2022
The contact owns a 2021 Chevrolet Bolt EV. The contact received a recall notification for NHTSA Campaign Number: 21V650000 (Electrical System). The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the issue. The part was not available for repair.
2021 Chevrolet Bolt EV · Electrical System · filed with NHTSA Jan 3, 2022
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 these Chevrolet models 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 |
|---|---|---|---|
| 18-NA-180 | Service bulletin | Sep 4, 2025 | This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| 22-NA-083 | Service bulletin | May 17, 2025 | This service bulletin provides Requirements for Replacement of the Dual Mode Cord Set Under Warranty. |
| PIE0753I | Service bulletin | May 15, 2025 | This engineering information (EI) will assist GM to recover a small number of electric vehicle battery packs from customer-owned vehicles in… |
| 24-NA-202 | Service bulletin | May 14, 2025 | This service bulletin provides dealers with Warranty Administration information on North American Charging Standard (NACS) DC Adapter Warran… |
| 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… |
| PIE0828 | Service bulletin | Apr 16, 2025 | This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer lis… |
| 23-NA-036 | Service bulletin | Apr 4, 2025 | This service bulletin provides diagnostic information for dealers/technicians on an Amber Light on Dual Level Portable Charge Cord Set. |
| 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… |
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 23-NA-157 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-157 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 23-NA-157 cover?
The manufacturer filed it against 6 model years: 2023 Chevrolet Bolt EUV, 2022 Chevrolet Bolt EUV, 2023 Chevrolet Bolt EV, 2022 Chevrolet Bolt EV, 2021 Chevrolet Bolt EV, 2020 Chevrolet Bolt EV. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.