Chevrolet bulletin N232408730
What it saysCertain Vehicles may not have the emergency light flashers enabled. NHTSA’s full summary ↓
Chevrolet filed this with NHTSA as a service bulletin dated Nov 21, 2023, received Nov 22, 2023, about the exterior lighting. It names 1 model year (2021). 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 communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
Service Update. Certain Vehicles may not have the emergency light flashers enabled. Dealers are to reprogram the body control module and lighting control module.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N232408730 | Service bulletin | Nov 21, 2023 | 10245392 | PDF, 412 KB |
What the document itself lists
The manufacturer titles it “N232408730 - Service Update”.
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 9106898 | Verified Module Software or Calibration Level: Module Is Programmed with Same Level… | 0.2 hrs |
| 9106899 | Body Control Module Reprogramming with SPS and Lighting Control Module Reprogramming… | 0.8 hrs |
Read by machine from the document NHTSA serves (5 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the hazard flashing warning lights for the 2021 Tahoe →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.
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 1 model year this bulletin names have filed 464 complaints with NHTSA since 2015. 58 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.
The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, the vehicle idled and loss power. The contact detected a smoke odor and smoke came inside the vehicle from the rear seats. The service ESC, traction control, forward collision, and engine warning lights were illuminated.
2021 Chevrolet Tahoe · Electrical System · filed with NHTSA Apr 19, 2021 · ODI 11412837
In depth: 2021 Chevrolet Tahoe electrical problems →
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 exterior lighting
Source: same model, same component group5 other manufacturer communications filed against the Chevrolet Tahoe under the same component group (exterior lighting), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 661.50 | Over-the-air update | Jun 17, 2026 | • Surround Vision Recorder, a new feature that allows you to record, watch, and save video from your vehicle's cameras. • Security Recording… |
| 01-08-42-001Q | Service bulletin | Jan 27, 2025 | This service bulletin provides information on Exterior Lamp Condensation and Water Leak Information and Replacement Guidelines. |
| PIT6310 | Service bulletin | Dec 19, 2024 | This Preliminary information communicates an issue where the rear tail lights may not work and dealership are to replace the tail light asse… |
| PIT5989A | Service bulletin | Feb 29, 2024 | This Preliminary information communicates a issue where the Can bus 1 data line is being corrupted by a aftermarket lighting module or poor… |
| 02-08-42-001J | Service bulletin | Jan 12, 2024 | This informational bulletin provides information for dealers/technicians on Headlamp, Tail Lamp, License Lamp or Fog/Driving Lamp Damage. |
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 N232408730 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 N232408730 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 N232408730 cover?
The manufacturer filed it against 1 model year: 2021 Chevrolet Tahoe. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.