GM bulletin PIT6074
What it saysThis Preliminary information communicates information on the Auxiliary Battery not charging. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Oct 11, 2023, received Dec 4, 2023, about the electrical system. It names 2 model years across Chevrolet and GMC (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 · GMC.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary information communicates information on the Auxiliary Battery not charging. Engineering is currently working on updated calibrations to correct concern.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIT6074 | Service bulletin | Oct 11, 2023 | 10246000 | not found |
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 themChevrolet 1 model year
GMC 1 model year
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 2 model years this bulletin names have filed 254 complaints with NHTSA since 2015. 91 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 GM brake controller will disconnect with the trailer being pulled. You get a message on the information center that the brake controller has lost connection with the trailer or no trailer brakes are available, something to that effect. This has happened up to 5 times in one day. You never know when this will happen.
2024 Chevrolet Silverado 2500HD · Electrical System · filed with NHTSA Nov 3, 2023 · ODI 11553366
I drove from California to ohio after I bought the truck, I noticed that when stopping to get gas my tailgate was open without me touching it. I drove with cameras showing the truck bed to see what happened and I watched it do it again while driving the vehicle, it just opened on its own while driving.
2024 GMC Sierra 2500HD · Electrical System · filed with NHTSA Jul 9, 2024 · ODI 11600504
The integrate trailer brake control system malfunctions when a trailer equipped with solar panels is hooked up. I recently rented a newer travel trailer and kept on getting a warning that the brake control system was disengaging. Every 30-60 seconds the system would connect and the quickly disconnect.
2024 Chevrolet Silverado 2500HD · Electrical System · filed with NHTSA Nov 7, 2023 · ODI 11554102
In depth: 2024 Chevrolet Silverado 2500HD 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 electrical system
Source: same model, same component group121 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 |
|---|---|---|---|
| 18-NA-180 | Service bulletin | Sep 4, 2025 | This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and Transaction Submission information. |
| 25-NA-121 | Service bulletin | May 13, 2025 | This service bulletin provides information on the radio software related issues to update the radio to the latest software version Y177. |
| 25-NA-119 | Service bulletin | May 9, 2025 | This service bulletin provides information on the Service Safety Restraint Message displayed on the DIC Airbag malfunction indicator illumin… |
| 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… |
| 21-NA-166 | Service bulletin | Apr 15, 2025 | This informational bulletin provides information on the turn signal stalk not cancelling and/or mis cancelling. |
| 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… |
| 23-NA-066 | Service bulletin | Apr 9, 2025 | This service bulletin refers the technician to Recall N242438501, and if closed, refer to SI to correct the condition of Malfunction Indicat… |
| 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 and GMC, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM PIT6074 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 PIT6074 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 PIT6074 cover?
The manufacturer filed it against 2 model years across 2 brands (Chevrolet and GMC): 2024 Chevrolet Silverado 2500HD, 2024 GMC Sierra 2500HD. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.