GMC bulletin 24-NA-029
What it saysThis informational bulletin provides information on HUMMER EV Water Leak Diagnostic Tips. NHTSA’s full summary ↓
GMC filed this with NHTSA as a service bulletin dated May 2, 2025, received Feb 23, 2024, about the structure — 3 documents under this number. It names 4 model years (2022–2025). 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 HUMMER EV Water Leak Diagnostic Tips.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 24-NA-029 | Service bulletin | May 2, 2025 | 11020260 | PDF, 733 KB |
| 24-NA-029 | Service bulletin | Jul 12, 2024 | 11004991 | PDF, 860 KB |
| 24-NA-029 | Service bulletin | Feb 8, 2024 | 10250513 | PDF, 286 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.
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.
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Model years it names
Source: as the manufacturer filed themAlso filed against model years this site has no page for: 2022 GMC Hummer EV Pickup.
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 24 complaints with NHTSA since 2015.
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 structure
Source: same model, same component group32 other manufacturer communications filed against these GMC models under the same component group (structure), newest first. The eight newest are listed; the rest are on the GMC list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| PIE0834 | Service bulletin | May 3, 2025 | This engineering information (EI) is requesting information from technicians to perform the check list provided and contact the engineer lis… |
| PIE0826 | Service bulletin | Apr 5, 2025 | This engineering information (EI) is requesting pictures from technicians in regard to center hood molding being loose and/or potentially de… |
| 22-NA-144 | Service bulletin | Feb 20, 2025 | This service bulletin provides a repair procedure to correct customer concerns of Power Windows, Door Locks and Outside Mirrors Inoperative… |
| 05-08-51-001L | Service bulletin | Feb 20, 2025 | This informational bulletin provides a procedure on how to remove the paint stain that may present itself under the shipping film. |
| 25-NA-003 | Service bulletin | Jan 30, 2025 | This service bulletin provides repair information to correct a customer concern of a rattle type noise heard from the brake pedal area. |
| 22-NA-244 | Warranty extension | Jan 30, 2025 | This warranty administration service bulletin provides information about GM Accessories - Dealer-Installed, Repaired or Replaced During Warr… |
| PIT6202D | Service bulletin | Jan 29, 2025 | This Preliminary information communicates how to repair the e-Trunk if it has lost it's learn with a new software update |
| 25-NA-012 | Service bulletin | Jan 17, 2025 | This technical bulletin provides repair information to correct a customer concern of Front Floor Console Center Compartment Door Stuck Close… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for GMC, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GMC 24-NA-029 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 24-NA-029 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 24-NA-029 cover?
The manufacturer filed it against 4 model years: 2025 GMC Hummer EV, 2024 GMC Hummer EV, 2023 GMC Hummer EV, 2022 GMC Hummer EV Pickup. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.