GM bulletin PIE0783C
What it saysThis engineering information (EI) closure ends the need for requesting further information from technicians in regard to the Check Engine Lamp illuminated on Driver Information Center (DIC). NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Sep 18, 2024, received Oct 29, 2024, about the engine. It names 4 model years across Chevrolet and Cadillac (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 · Cadillac.
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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 Check Engine Lamp illuminated on Driver Information Center (DIC).
Trouble codes it names: P0496 all 1 read from the document itself; NHTSA’s summary names none
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIE0783C | Service bulletin | Sep 18, 2024 | 11009458 | PDF, 116 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
Cadillac 3 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 4 model years this bulletin names have filed 190 complaints with NHTSA since 2015. 19 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.
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 · ODI 11596124
Transmission & engine failure. Press the gas and it doesn’t move the car-feels as if it is trying to change gears and it isn’t working. Car under warranty & still not working. Been to the dealership multiple times and they are unable to fix the issue. No warning signs
2024 Chevrolet Blazer · Engine · filed with NHTSA Oct 28, 2025 · ODI 11696006
The contact owns a 2024 Cadillac XT5. The contact stated that while driving approximately 10 - 15 MPH and depressing the accelerator pedal, the vehicle failed to respond. There was an abnormal vibrating sound coming from the engine. A dealer was contacted.
2024 Cadillac XT5 · Engine · filed with NHTSA Feb 17, 2026 · ODI 11718637
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 group80 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 |
|---|---|---|---|
| N262570770-03 | Service campaign | Oct 16, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are t… |
| N262570770-02 | Service campaign | Sep 25, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to… |
| N262570770-01 | Service campaign | Sep 18, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to… |
| N262570770 | Service campaign | Sep 15, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to… |
| N262568830 | Service campaign | Aug 4, 2026 | Certain vehicles listed above may have a condition in which the oil filter was not adequately tightened. Dealers are to check and tighten th… |
| 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… |
| 25-NA-249 | Service bulletin | Sep 3, 2025 | This service bulletin provides the correction to the condition of the Malfunction Indicator Lamp being illuminated and/or the DTC P149E set. |
| N252502891 | Service campaign | Jul 16, 2025 | Customer Satisfaction Program. Certain vehicles listed above may have a condition in which the internal differential nut was cross threaded… |
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 Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM PIE0783C 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 PIE0783C 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. Every GM warranty extension on file lists the ones GM has filed.
Which vehicles does PIE0783C cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and Cadillac): 2024 Cadillac XT4, 2024 Cadillac XT5, 2024 Cadillac XT6, 2024 Chevrolet Blazer. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.