GM bulletin PIP5993A
What it saysThis Preliminary information communicates the possibility of the engine running rough cold and failing dtc P050D. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Sep 13, 2024, about the engine. It names 5 model years across Chevrolet, GMC and Buick (2024–2025). 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 · Buick.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary information communicates the possibility of the engine running rough cold and failing dtc P050D.
Trouble codes it names: P050D
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIP5993A | Service bulletin | Sep 13, 2024 | 11007769 | PDF, 28 KB |
What the document itself lists
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 4088468 | Misfire Diagnosis | 2 hrs |
Read by machine from the document NHTSA serves (1 page), read Sep 30, 2026. A part number is shown only where it matches GM’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.
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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 2 model years
GMC 2 model years
Buick 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 5 model years this bulletin names have filed 479 complaints with NHTSA since 2015. 66 of them name Engine — 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.
Owned brand new vehicle for 48 hours. Fuel injector failure on cylinder 4 at 120 miles on the dash. Check engine light was on. Vehicle is currently at dealership. Engine unreliable/unsafe. Dealer confirmed. Dealer stated up to 10 days waiting on parts. Unknown if further damage has been caused. Wife states vehicle had a rough idle.
2025 Chevrolet Traverse · Engine · filed with NHTSA Mar 15, 2025
bought car brand new at 427 miles car started bucking shaking pulsating while driving bought to brennen gmc plattsburgh ny at 811 mile did same thing but worse brought back to dealership they put camshaft actuater and solenoid in at 6041 mile car was motor started knocking stalling controlable in traffic back at shop
2025 GMC Acadia · Engine · filed with NHTSA Aug 23, 2025
While 2 hours from home driving down the interstate with a full vehicle, the vehicle alarmed and the screen notified "No Oil Pressure, Turn Car Off Now". I pulled over immediately and we had to sit on the edge of the interstate for 45 minutes - a safety hazard for us and the surrounding traffic.
2024 GMC Acadia · Engine · filed with NHTSA Aug 12, 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 engine
Source: same model, same component group87 other manufacturer communications filed against these GM models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N262546590-01 | Service campaign | Jul 15, 2026 | Certain vehicles listed above, may have a condition where coolant leaks from the radiator hose quick connect at the radiator inlet. This sp… |
| N252540910 | Service campaign | Feb 25, 2026 | Service Update. Certain vehicles listed above may have a condition in which a quality issue with the engine was identified. Dealers will re… |
| N252508350 | Service campaign | Oct 21, 2025 | Certain vehicles listed above, may have a condition that could cause the engine coolant thermostat to open at a lower temperature than inten… |
| N252503850 | Warranty extension | Jun 10, 2025 | Special Coverage. Certain vehicles listed above may have a condition that could cause the mounting bracket on the front exhaust pipe to sep… |
| 00-06-01-026R | Service bulletin | Jun 5, 2025 | This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage. |
| 25-NA-132 | Service bulletin | May 17, 2025 | This bulletin provides a procedure to verify a noise and replace the oil pump shaft assembly if the gears of the pump and balance shaft are… |
| 24-NA-201 | Service bulletin | May 16, 2025 | This bulletin provides a procedure to replace the oil pump due to a loose drive pump gear not pressed on the pump shaft. |
| 23-NA-153 | Service bulletin | May 15, 2025 | The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet, GMC and Buick, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM PIP5993A 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 PIP5993A 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 PIP5993A cover?
The manufacturer filed it against 5 model years across 3 brands (Chevrolet, GMC and Buick): 2025 Buick Enclave, 2025 Chevrolet Traverse, 2024 Chevrolet Traverse, 2025 GMC Acadia, 2024 GMC Acadia. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.