GM bulletin 23-NA-222
What it saysThis service bulletin provides repair information to correct a customer concern of Radio Software issues and provide software (Version W26E-172.4.2-M169-SQBR4-123.4) Updates for IVD. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Apr 8, 2025, received Dec 22, 2023, about the electrical system — 8 documents under this number. It names 4 model years across Chevrolet and Cadillac (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.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · Cadillac.
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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 Radio Software issues and provide software (Version W26E-172.4.2-M169-SQBR4-123.4) Updates for IVD.
Trouble codes it names: B1596 B19B0 B1C47 U164E all 4 read from the document itself; NHTSA’s summary names none
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 23-NA-222 | Service bulletin | Apr 8, 2025 | 11018051 | PDF, 136 KB |
| 23-NA-222 | Service bulletin | Jan 11, 2025 | 11013029 | PDF, 852 KB |
| 23-NA-222 | Service bulletin | Jun 29, 2024 | 11004877 | PDF, 1,283 KB |
| 23-NA-222 | Service bulletin | Apr 12, 2024 | 10253726 | PDF, 108 KB |
| 23-NA-222 | Service bulletin | Mar 26, 2024 | 10252790 | PDF, 107 KB |
| 23-NA-222 | Service bulletin | Jan 22, 2024 | 10250260 | PDF, 144 KB |
| 23-NA-222 | Service bulletin | Jan 9, 2024 | 10249459 | PDF, 144 KB |
| 23-NA-222 | Service bulletin | Dec 14, 2023 | 10247595 | PDF, 143 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.
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Model years it names
Source: as the manufacturer filed themChevrolet 1 model year
Cadillac 3 model years
Also filed against model years this site has no page for: 2024 Cadillac Redundant Lyriq.
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 3 model years this bulletin names have filed 245 complaints with NHTSA since 2015. 66 of them name Electrical 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.
On February 4, 2026, my wife drove to the bank, a trip of about 10 to 15 minutes, and turned off the car at the ATM. When she tried to leave, the vehicle wouldn't start. After a while, she opened and closed the door and locked and unlocked the car twice with the remote control, and the vehicle started and she was able to drive, but all…
2024 Chevrolet Blazer · Electrical System · filed with NHTSA Feb 5, 2026
While driving the car rapidly decelerated along with loss to steering control. The engine essentially shutdown and would not accelerate past 30 MPH with full force. Oil temperature was 280/300 and rising.
2024 Cadillac XT4 · Electrical System · filed with NHTSA Mar 21, 2025
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 group237 other manufacturer communications filed against these GM 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 |
|---|---|---|---|
| N242468490-02 | Service campaign | May 28, 2026 | Certain vehicles may have missing cavity plugs from the rear chassis harness electrical connector. Dealers are to inspect the rear chassis h… |
| 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. |
| 23-NA-151 | Service bulletin | May 16, 2025 | This service bulletin and criteria within are to determine the internal state of the High Voltage Battery and core return shipping method. |
| 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… |
| 25-NA-044 | Service bulletin | May 14, 2025 | This service bulletin provides information for dealers/technicians on SPS2 Hybrid/EV Battery Data Retrieval for Service High Voltage DTCs. |
| 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… |
| 25-NA-126 | Service bulletin | May 14, 2025 | This service bulletin provides information on the wireless charging feature not working or intermittently working, with the replacement of t… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM 23-NA-222 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-222 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-222 cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and Cadillac): 2024 Cadillac Lyriq, 2024 Cadillac XT4, 2024 Chevrolet Blazer, 2024 Cadillac Redundant Lyriq. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.