GM bulletin PIE0814B
What it saysThis engineering information (EI) closure ends the need for requesting further information from technicians in regard to the Service AWD Lamp illuminated on Driver Information Center (DIC) and to refer to SI for further… NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated May 7, 2025, received Sep 10, 2025, about the power train. It names 2 model years across Chevrolet and GMC (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 · GMC.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis engineering information (EI) closure ends the need for requesting further information from technicians in regard to the Service AWD Lamp illuminated on Driver Information Center (DIC) and to refer to SI for further diagnosis.
Trouble codes it names: C0090 all 1 read from the document itself; NHTSA’s summary names none
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIE0814B | Service bulletin | May 7, 2025 | 11023056 | PDF, 114 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 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 404 complaints with NHTSA since 2015. 136 of them name Electrical System, 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.
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
Car locks itself into 2 Wheel Drive when conditions are "unfavorable" meaning sometimes rain and most commonly in cold weather. If anyone has driven on snowy and icy roads during the winter, they know how much of a problem this can cause in the winter.
2025 GMC Terrain · Power Train · filed with NHTSA May 5, 2026
Center screen went black and is completely inoperational. Cannot utilize any center screen functions including headlights and rear backup camera. Took vehicle to dealer and they diagnosed as a bad display control unit, which is on backorder
2025 Chevrolet Equinox · Electrical System · filed with NHTSA Apr 22, 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 power train
Source: same model, same component group56 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… |
| 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 |
| 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… |
| PIP6032A | Service bulletin | Jan 29, 2025 | This Preliminary Information communication advises the technician on possible sources of transmission fluid leaks from the transmission oil… |
| PIE0814 | Service bulletin | Jan 18, 2025 | This engineering informational bulletin is requesting information from technicians to perform the check list provided and contact the engine… |
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 PIE0814B 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 PIE0814B 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 PIE0814B cover?
The manufacturer filed it against 2 model years across 2 brands (Chevrolet and GMC): 2025 Chevrolet Equinox, 2025 GMC Terrain. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.