GM bulletin PIP5929A
What it saysThis Preliminary information communicates to the dealers diagnostic tips related to MIL on with P219A. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Dec 16, 2024, received Dec 20, 2024, about the fuel/propulsion system. It names 9 model years across Chevrolet and Buick (2020–2025). 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 the dealers diagnostic tips related to MIL on with P219A.
Trouble codes it names: P219A
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIP5929A | Service bulletin | Dec 16, 2024 | 11012013 | PDF, 28 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 5 model years
Buick 4 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 9 model years this bulletin names have filed 851 complaints with NHTSA since 2015. 37 of them name Fuel/Propulsion 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.
I've been dealing with a frustrating car issue lately where my vehicle keeps stalling and hesitating during acceleration - whether I'm pulling away from a stop or trying to pick up speed on the road. After getting it checked out, my mechanic determined that the high pressure fuel pump control module is the culprit and needs replacement.
2020 Buick Encore · Fuel/Propulsion System · filed with NHTSA Oct 3, 2025
The contact owns a 2022 Buick Encore. The contact stated that while parked and refueling the vehicle, the contact observed an abnormal gasoline odor. Additionally, when the contact entered the vehicle there was an abnormally strong strong gasoline odor inside the vehicle. There were no warning lights illuminated.
2022 Buick Encore · Fuel/Propulsion System · filed with NHTSA Apr 22, 2024
Failure of the evaporative emission purge pump at 34,600 miles. Diagnostic code P146B (pump failure). VIN not included on the affected vehicle list but should be. Failed pump part number is 25204641 (matches affected pump part numbers)
2023 Buick Encore · Fuel/Propulsion System · filed with NHTSA Sep 2, 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 fuel/propulsion system
Source: same model, same component group12 other manufacturer communications filed against these GM models under the same component group (fuel/propulsion system), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| A252528630-03 | Service campaign | Feb 9, 2026 | Service Update. On certain vehicles listed above, under certain driving conditions and due to differences in flow rate characteristics, the… |
| A252528630-02 | Service campaign | Jan 28, 2026 | Service Update. On certain vehicles listed above, under certain driving conditions and due to differences in flow rate characteristics, the… |
| A252528630-01 | Service campaign | Jan 7, 2026 | Service Update. On certain vehicles listed above, under certain driving conditions and due to differences in flow rate characteristics, the… |
| A252528630 | Service campaign | Dec 9, 2025 | Service Update. On certain vehicles listed above, under certain driving conditions and due to differences in flow rate characteristics, the… |
| 24-NA-139 | Service bulletin | Apr 12, 2025 | This bulletin provides a procedure to replace the FPDCM if found to cause customers concerns of Crank No Start, Stalling, Loss of Power, Fue… |
| PIP6037 | Service bulletin | Jan 16, 2025 | This Preliminary information communicates a potential for dtc p0496 to fail due to damaged purge solenoid valve O-rings. |
| 05-06-04-022V | Service bulletin | Aug 7, 2024 | This bulletin provides information on the TOP TIER Detergent Gasoline Licensed Brands and the TOP TIER Diesel Fuel Licensed Brands that are… |
| 04-06-04-051I | Service bulletin | Jun 29, 2024 | This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive. |
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 PIP5929A 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 PIP5929A 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 PIP5929A cover?
The manufacturer filed it against 9 model years across 2 brands (Chevrolet and Buick): 2023 Buick Encore, 2022 Buick Encore, 2021 Buick Encore, 2020 Buick Encore, 2023 Chevrolet Trailblazer, 2022 Chevrolet Trailblazer and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.