GM bulletin N222392451
What it saysCertain vehicles equipped with the 6.2L, 8-cylinder gas engine, (RPO LT4), may have potentially been manufactured with machining debris left inside the engine. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Jul 27, 2023, received Aug 2, 2023, about the engine. It names 2 model years across Chevrolet and Cadillac (2023). 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 communicationPicked out of NHTSA’s summary below, word for word. The document itself is the record, and the dealer checks the VIN.
What it applies to, as NHTSA’s summary states it — build dates and equipment as the manufacturer filed them. The dealer checks the VIN and the build date on the door jamb; a vehicle outside the window is not covered by this bulletin.
Customer Satisfaction Program - Certain vehicles equipped with the 6.2L, 8-cylinder gas engine, (RPO LT4), may have potentially been manufactured with machining debris left inside the engine. Dealers are to replace the engine. Only 5 vehicles are included in this field action.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| N222392451 | Service bulletin | Jul 27, 2023 | 10239763 | PDF, 149 KB |
What the document itself lists
The manufacturer titles it “N222392451 - Customer Satisfaction Program”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 12716403 | LT4-Engine (Camaro) | — | eBay Motors → |
| 13579648 | A/C Condenser Hose Seal | — | eBay Motors → |
| 22860193 | Catalytic Converter Clamp | — | eBay Motors → |
| 21992620 | Exhaust System Seal | — | eBay Motors → |
| 12624939 | Exhaust System Front Gasket | — | eBay Motors → |
| 12657430 | Water Pump Gasket | — | eBay Motors → |
| 12679527 | Intake Manifold Gasket | — | eBay Motors → |
| 12657093 | Exhaust Manifold Gasket | — | eBay Motors → |
| 11610915 | Front Lower Control Arm Bolt | — | eBay Motors → |
| 11547921 | Front Suspension Cradle Intermediate Bolt | — | eBay Motors → |
| 11611268 | Front Lower Control Arm Bolt | — | eBay Motors → |
| 12563485 | Flywheel Bolt | — | eBay Motors → |
| 19432866 | — | — | |
| 19433272 | — | — | |
| 12346290 | — | — | |
| 10953464 | — | — | |
| 19432442 | Fuel Injector O-Ring Seal Kit | — | eBay Motors → |
| 12703668 | Fuel Feed Intermediate Pipe | — | eBay Motors → |
| 12677005 | Fuel Feed Intermediate Pipe | — | eBay Motors → |
| 12623308 | Fuel Pump Bracket Gasket | — | eBay Motors → |
| 11546600 | Exhaust Manifold Bolt | — | eBay Motors → |
| 12716404 | LT4-Engine (Escalade) | — | eBay Motors → |
| 12703669 | Fuel Feed Intermediate Pipe | — | eBay Motors → |
| 12726902 | Fuel Injector O-Ring Seal Kit | — | eBay Motors → |
| 11546958 | Intake Manifold Bolt | — | eBay Motors → |
| 12642745 | Charge Air Cooler Housing Gasket | — | eBay Motors → |
| 12665158 | Charge Air Cooler Housing Gasket | — | eBay Motors → |
| 12626354 | Intake Manifold Gasket | — | eBay Motors → |
| 15035747 | Exhaust System LH Seal | — | eBay Motors → |
| 23129010 | Engine Oil Cooler Gasket | — | eBay Motors → |
| 13579646 | A/C Compressor and Condenser Hose Seal | — | eBay Motors → |
| 13579649 | A/C Condenser Hose Seal | — | eBay Motors → |
| 84369120 | Transmission Fluid Cooler Seal | — | eBay Motors → |
| 15077362 | Exhaust System RH Seal | — | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 9106624 | Engine Replacement Escalade Camaro Add: Front End Alignment Add: Recover and… | 20.4 hrs |
Read by machine from the document NHTSA serves (6 pages), 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 1 model year
Cadillac 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 2 model years this bulletin names have filed 251 complaints with NHTSA since 2015. 200 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.
On the 2023 Cadillac Escalade, the 24 owners who gave an odometer reading for Engine reported it at a median of 30,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
Engine failure which required a full engine replacement. The vehicle is unmodified and the engine was replaced under warranty. The certified Chevrolet dealer that replaced the engine confirmed that the issue was the same bearing failure that is impacting the 6.2L L87 V8 engines.
2023 Chevrolet Camaro · Engine · filed with NHTSA Dec 13, 2025 · ODI 11704912
Vehicle: 2023 Cadillac Escalade Mileage at Incident: Approx. 43,000 Date of Incident: April 1, 2025 I had my 2023 Cadillac Escalade serviced at the dealership to replace two tires and perform an oil change.
2023 Cadillac Escalade · Engine · filed with NHTSA Apr 23, 2025 · ODI 11656317
while driving car stoopped runnig on expressway ; said electrical system low ; later found out at dealer engine siezed
2023 Chevrolet Camaro · Engine · filed with NHTSA Apr 7, 2025 · ODI 11653298
In depth: 2023 Cadillac Escalade engine problems →
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 group101 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 |
|---|---|---|---|
| N262552620 | Service campaign | May 11, 2026 | Certain vehicles may have a condition that could cause the cylinder 2 glow plug to fail. If this failure occurs, the Malfunction Indicator… |
| N252494003-02 | Service campaign | Jan 21, 2026 | Certain vehicles listed above, may have a condition where the connecting rod and/or crankshaft engine components in these vehicles may have… |
| 25-NA-339 | Service bulletin | Nov 6, 2025 | Under Field Actions N252494000, N252494001, the service procedure includes performing a PICO test on vehicle engines within the identified s… |
| N252508341 | Service campaign | Sep 16, 2025 | Certain vehicles listed above, may have a condition that could cause the engine coolant control valve to fail an onboard vehicle diagnostic… |
| 22-NA-080 | Service bulletin | Sep 6, 2025 | This technical bulletin provides a procedure to replace the camshaft actuator magnet to correct customer concerns of engine related shudder. |
| 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… |
| 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. |
| N252494003 | Service campaign | May 23, 2025 | Certain vehicles listed above, may have a condition where the connecting rod and/or crankshaft engine components in these vehicles may have… |
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 N222392451 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 N222392451 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 N222392451 cover?
The manufacturer filed it against 2 model years across 2 brands (Chevrolet and Cadillac): 2023 Cadillac Escalade, 2023 Chevrolet Camaro. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.