GM bulletin PIP4964E
What it saysThis Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Oct 16, 2023, received Dec 4, 2023, about the exterior lighting. It names 99 model years across Chevrolet, GMC, Buick and Cadillac (2016–2024). 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.
Get the next GM bulletin for your model by email Weekly, only when something new is filed. Nothing else; one-click unsubscribe.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis Preliminary Information communication provides information to the technician about vehicles that have a Service Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Code P2097 or P2099. Technician will need to perform an injector balance or Active Fuel Injector Tester prior to going further. Technician will also need to check for a small leak in the exhaust if published Service Information diagnostics does not lead to a resolution.
Trouble codes it names: P2097 P2099
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIP4964E | Service bulletin | Oct 16, 2023 | 10246003 | 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the automatic (asc) for the 2024 Camaro →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
Model years it names
Source: as the manufacturer filed themChevrolet 31 model years
GMC 18 model years
and 9 more on this site: 2022 GMC Canyon, 2021 GMC Canyon, 2020 GMC Canyon, 2019 GMC Canyon, 2018 GMC Canyon, 2017 GMC Canyon, 2016 GMC Canyon, 2017 GMC Terrain, 2016 GMC Terrain.
Buick 13 model years
and 5 more on this site: 2016 Buick Enclave, 2019 Buick LaCrosse, 2018 Buick LaCrosse, 2017 Buick LaCrosse, 2016 Buick LaCrosse.
Cadillac 37 model years
and 29 more on this site: 2022 Cadillac CT5, 2021 Cadillac CT5, 2020 Cadillac CT6, 2019 Cadillac CT6, 2018 Cadillac CT6, 2017 Cadillac CT6, 2016 Cadillac CT6, 2019 Cadillac CTS, 2018 Cadillac CTS, 2017 Cadillac CTS, 2016 Cadillac CTS, 2016 Cadillac SRX, 2024 Cadillac XT5, 2023 Cadillac XT5, 2022 Cadillac XT5, 2021 Cadillac XT5, 2020 Cadillac XT5, 2019 Cadillac XT5, 2018 Cadillac XT5, 2017 Cadillac XT5, 2024 Cadillac XT6, 2023 Cadillac XT6, 2022 Cadillac XT6, 2021 Cadillac XT6, 2020 Cadillac XT6, 2019 Cadillac XTS, 2018 Cadillac XTS, 2017 Cadillac XTS, 2016 Cadillac XTS.
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Email me new GM bulletins for one of these models
A weekly email, sent only in a week when GM files something new with NHTSA for the model you pick — service bulletins, campaigns, warranty extensions, over-the-air notices, every model year. Nothing else is sent; one-click unsubscribe in every message. Separate from recall alerts.
What owners reported
Source: NHTSA complaint databaseOwners of the 99 model years this bulletin names have filed 9,490 complaints with NHTSA since 2015. 428 of them name Fuel/Propulsion System, Exterior Lighting, Electronic Stability Control — 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 2016 Cadillac SRX, the 34 owners who gave an odometer reading for Exterior Lighting reported it at a median of 63,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Driving home tonight there was a car in front of me so my low beams were on. I saw a deer approaching from the right side of the roadway while at the same time dropping down into a small dip in the road and because the headlights are so low I lost sight of the deer as it was then in the shadows with no illumination because the headlights…
2022 Chevrolet Traverse · Exterior Lighting · filed with NHTSA Dec 28, 2022
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
When I get to a stop sign, and a stop light, when trying to accelerate after a complete stop, the car would struggle to accelerate to go forward. Where the shifting gears would start blinking, and the warning lights (engine power reduced, engine light, and the traction safety collision light) would display itself making it misfire and…
2018 Buick LaCrosse · Fuel/Propulsion System · filed with NHTSA Nov 11, 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 exterior lighting
Source: same model, same component group24 other manufacturer communications filed against these GM models under the same component group (exterior lighting), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 25-NA-074 | Service bulletin | Sep 4, 2025 | Some customers may comment on rear body structure stop lamp or rear closure signal lamp may be totally inoperative or staying illuminated. |
| 25-NA-075 | Service bulletin | Mar 29, 2025 | This bulletin has Information on Parking Light Headlamps. |
| 25-NA-073 | Service bulletin | Mar 28, 2025 | This technical bulletin provides Approach Lighting Exterior and Interior Operation information and procedures. |
| 23-NA-086 | Service bulletin | Feb 12, 2025 | This informational bulletin provides information on dark spots in the headlamp pattern when the vehicle is pulled up to a wall or garage. |
| 01-08-42-001Q | Service bulletin | Jan 27, 2025 | This service bulletin provides information on Exterior Lamp Condensation and Water Leak Information and Replacement Guidelines. |
| PIT6308 | Service bulletin | Dec 17, 2024 | This Preliminary information communicates information about if the rear tail lamp is inoperative to cycle the fuse. If the tail lamp is work… |
| PIE0801D | Service bulletin | Dec 5, 2024 | This engineering information (EI) closure ends the need for gathering further information from technicians in regard to the right and/or lef… |
| PIT6238C | Service bulletin | Nov 22, 2024 | This Preliminary information communicates information about if the rear tail lamp is inoperative to cycle the connector at the tail lamp. If… |
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 PIP4964E 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 PIP4964E 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 PIP4964E cover?
The manufacturer filed it against 99 model years across 4 brands (Chevrolet, GMC, Buick and Cadillac): 2024 Buick Enclave, 2023 Buick Enclave, 2022 Buick Enclave, 2021 Buick Enclave, 2020 Buick Enclave, 2019 Buick Enclave and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.