GM bulletin PIP6033
What it saysThis Preliminary information communicates to technicians to remove the pulley assembly and inspect the drive chain and pulley surfaces. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Dec 11, 2024, received Dec 16, 2024, about the power train. It names 10 model years across Chevrolet and Buick (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.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · Buick.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary information communicates to technicians to remove the pulley assembly and inspect the drive chain and pulley surfaces.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIP6033 | Service bulletin | Dec 11, 2024 | 11011865 | PDF, 39 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.
Model years it names
Source: as the manufacturer filed themChevrolet 7 model years
Buick 3 model years
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 10 model years this bulletin names have filed 910 complaints with NHTSA since 2015. 140 of them name Power Train — 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.
Repeat issues with the transmission, ongoing issue for about two months. Initially experienced the vehicle not shifting in drive or reverse, which was resolved in drive. The issue persists when in reverse, where I will put it in gear but it will rev without moving, as if the vehicle is in neutral .
2023 Chevrolet Trailblazer · Power Train · filed with NHTSA Oct 30, 2023
The contact owns a 2025 Chevrolet Equinox. The contact stated while reversing at an undisclosed speed, the vehicle shuddered and stalled. The contact stated that the failure had occurred on several occasions. The contact stated that the check engine warning light was intermittently illuminated.
2025 Chevrolet Equinox · Power Train · filed with NHTSA May 27, 2025
When driving on the freeway 60 mph, the car jerked and locked up, no warning lights, speedometer was rising and dropping rapidly, car slowly dropped speed. Had to pull on the side of the road, when car was put to parked, neutral, or drive it went backwards until it wasn’t able to move at all.
2024 Buick Encore · Power Train · filed with NHTSA Jul 14, 2026
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 power train
Source: same model, same component group72 other manufacturer communications filed against these GM models under the same component group (power train), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N252502890-01 | Service campaign | Aug 20, 2026 | Certain vehicles may have a condition in which the internal differential nut was cross threaded or missing during assembly. Dealers will rev… |
| N242471460-01 | Service campaign | Aug 20, 2026 | Certain vehicles may have been built with an Electric Drive Unit mounting bolt that is too long, causing damage to the Drive Unit case. Deal… |
| PIE0814B | Service bulletin | May 7, 2025 | This engineering information (EI) closure ends the need for requesting further information from technicians in regard to the Service AWD Lam… |
| PIP6036A | Service bulletin | Apr 2, 2025 | This Preliminary information communicates diagnostic aids for a surge or fishbite concern |
| 25-NA-001 | Service bulletin | Mar 13, 2025 | This service bulletin provides repair information to correct a customer concern of a transmission fluid leak. |
| PIP5966A | Service bulletin | Mar 2, 2025 | This Preliminary information communicates Diagnostic aids for a no start or DTC'S following a transmission replacement |
| PIP5975A | Service bulletin | Feb 25, 2025 | This Preliminary information communicates information on what dealer technicians should due if they encounter a broken chain on a CVT transm… |
| 16-NA-019 | Service bulletin | Feb 12, 2025 | This informational buleltin provides information on Transmission Adaptive Functions and Correcting Low Mileage Harsh Shifts, Slips, or Flare… |
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 Buick, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM PIP6033 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 PIP6033 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 PIP6033 cover?
The manufacturer filed it against 10 model years across 2 brands (Chevrolet and Buick): 2024 Buick Encore, 2023 Buick Encore, 2022 Buick Encore, 2025 Chevrolet Equinox, 2024 Chevrolet Malibu, 2023 Chevrolet Malibu and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.