GM bulletin PIP5863B
What it saysThis Preliminary information communicates to dealers? information related to a Malfunction Indicator Lamp (MIL) Illuminated due to a U0672 setting. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Mar 5, 2024, received Apr 15, 2024, about the fuel/propulsion system. It names 56 model years across Chevrolet, GMC, Buick and Cadillac (2019–2024). 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 · Buick · Cadillac.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary information communicates to dealers? information related to a Malfunction Indicator Lamp (MIL) Illuminated due to a U0672 setting. Advises the technician to perform Electric Engine Coolant Pump connection inspections. To clear the code to see if it resets current. If the code resets it advises to utilize Strategy Based Diagnosis. If the code does not reset, it advises to release the vehicle to the customer and that GM is aware of this issue.
Trouble codes it names: U0672
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIP5863B | Service bulletin | Mar 5, 2024 | 10253062 | 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.
Model years it names
Source: as the manufacturer filed themChevrolet 13 model years
GMC 13 model years
Buick 4 model years
Cadillac 26 model years
and 16 more on this site: 2024 Cadillac XT4, 2023 Cadillac XT4, 2022 Cadillac XT4, 2021 Cadillac XT4, 2020 Cadillac XT4, 2019 Cadillac XT4, 2024 Cadillac XT5, 2023 Cadillac XT5, 2022 Cadillac XT5, 2021 Cadillac XT5, 2020 Cadillac XT5, 2024 Cadillac XT6, 2023 Cadillac XT6, 2022 Cadillac XT6, 2021 Cadillac XT6, 2020 Cadillac XT6.
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 56 model years this bulletin names have filed 9,173 complaints with NHTSA since 2015. 4,301 of them name Engine, Fuel/Propulsion System, Exterior Lighting — 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.
On the 2019 Chevrolet Silverado, the 142 owners who gave an odometer reading for Engine reported it at a median of 71,396 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Fuel pump control module has failed twice. First time vehicle was stranded in middle of 6 lane highway. Second time was not as serious location. This part fails without any notice and vehicle can not be put in netural to be pushed or towed without a lot of difficulty. Service manager told me they change up to 15 of these modules a month.
2021 Cadillac XT5 · Fuel/Propulsion System · filed with NHTSA Jan 16, 2025
LED headlamps on both sides of vehicle routinely "flicker" / "blink". The effect is such that oncoming traffic assumes you are "flashing" them or "high beaming" them. Have had several encounters with motorists honking at me or yelling as I pass by. I was also break checked by a vehicle in front of me on the highway when driving at night.
2024 GMC Canyon · Exterior Lighting · filed with NHTSA Aug 6, 2024
Engine problem loss of power intermittently no reverse. They replaced clutch parts seals, piston, rings, plates, and plates. Had Vehicle for about 22 days. Driving home after repairs completed. Cluster display- instrument panel went out. Called Dealer and Cadillac assistance. Says there nothing they can do until Cadillac releases a fix.
2024 Cadillac XT5 · Engine · filed with NHTSA Jun 24, 2024
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 group67 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 |
|---|---|---|---|
| N262558690-02 | Service campaign | Sep 23, 2026 | General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power… |
| N262558690 | Service campaign | Sep 16, 2026 | General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition which can cause the fuel pump power… |
| N242452131-02 | Emissions | Sep 11, 2026 | Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall involving certain 2023-2024 model year Chevrolet Colorad… |
| N262558690-01 | Service campaign | Sep 1, 2026 | Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles listed above may have a condition whic… |
| N242452130-01 | Service campaign | Aug 4, 2026 | Certain vehicles may have a condition in which the Engine Control Module (ECM) does not sufficiently control fuel injector flow rate under c… |
| N262546590 | Service campaign | Apr 1, 2026 | Certain vehicles listed above, may have a condition where coolant leaks from the radiator hose quick connect at the radiator inlet. This sp… |
| N252542200 | Service campaign | Mar 16, 2026 | Service Update. Certain vehicles listed above may have contamination inside the high-pressure fuel pump spill valve assembly. Dealers will… |
| N252516900-01 | Emissions | Feb 19, 2026 | Emission Recall. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles listed above may have a condition whi… |
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, Buick and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM PIP5863B 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 PIP5863B 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 PIP5863B cover?
The manufacturer filed it against 56 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2024 Buick Envision, 2023 Buick Envision, 2022 Buick Envision, 2021 Buick Envision, 2024 Cadillac CT4, 2023 Cadillac CT4 and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.