NHTSA ID Number: 11018541
Manufacturer Communication Number: N252494003
TSB/Document Date: 2025-05-23
Summary
Certain vehicles listed above, may have a condition where the connecting rod and/or crankshaft engine components in these vehicles may have manufacturing defects that can lead to engine damage and engine failure. This special coverage covers if an engine failure occurs in the vehicle as a result of the condition described above for a period of 10 years or 150,000 miles (240,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after May 23, 2025, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to May 23, 2025, must be submitted to the Service Contract provider. Vehicle owners or lessees who paid for repairs referenced in this Special Coverage (“Customers”) are eligible for reimbursement of their reasonable and customary expenses in accordance with the procedures specified below. The conditional right to reimbursement is provided by GM solely in the interest of customer satisfaction and is personal to Customers. Customers may not assign and GM does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to receive reimbursement, or any other rights granted by this Special Coverage to any third party, including but not limited to service contract providers, and this Special Coverage is not intended to and does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to reimbursement, against GM, whether in law, equity or otherwise, on any third parties. Dealers are to replace the engine. The repairs will be made at no charge to the customer.
GENERAL MOTORS
DCS7224
URGENT - DISTRIBUTE IMMEDIATELY
Date:
May 23, 2025
Subject: N252494003- Special Coverage
L87 Engine Loss of Propulsion
Models: 2021-2024 Cadillac Escalade
2021-2024 Cadillac Escalade ESV
2021-2024 Chevrolet Silverado 1500
2021-2024 Chevrolet Suburban
2021-2024 Chevrolet Tahoe
2021-2024 GMC Sierra 1500
2021-2024 GMC Yukon
2021-2024 GMC Yukon XL
General Motors is releasing Special Coverage N252494003 today.
This is a phased launch.
Vehicles that are remedied and closed in IVH under Safety Bulletins
N252494000 or N252494001 or N252494002 will be added to the Special
Coverage population. The Applicable Warranties section on the Investigate
Vehicle History (IVH) screen will be updated regularly and without notice for
future VIN additions.
The Applicable Warranties section on the Investigate Vehicle History (IVH)
screen will initially be updated May 23, 2025. It will be updated regularly and
without notice for future VIN additions. Please verify a VIN's involvement in this
Special Coverage by checking in IVH. IVH is the best source for individual VIN
inquiries.
A Stock VIN list is not included as our records show there are no vehicles in
dealer new inventory.
END OF MESSAGE
Special Coverage
N252494003 L87 Engine Loss of Propulsion
Release Date:
May 2025
Revision:
00
Model Year
Make
Cadillac
Cadillac
Chevrolet
Chevrolet
Chevrolet
GMC
GMC
GMC
Model
Escalade
Escalade ESV
Silverado 1500
Suburban
Tahoe
Sierra 1500
Yukon
Yukon XL
From
2021
2021
2021
2021
2021
2021
2021
2021
To
2024
2024
2024
2024
2024
2024
2024
2024
Attention: Involved vehicles are identified on the Applicable Warranties section in Investigate Vehicle History (IVH). This
site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.
Condition
Special
Coverage
Certain vehicles listed above, may have a condition where the connecting rod and/or crankshaft engine
components in these vehicles may have manufacturing defects that can lead to engine damage and
engine failure.
This special coverage covers if an engine failure occurs in the vehicle as a result of the condition
described above for a period of 10 years or 150,000 miles (240,000 km), whichever occurs first, from the
date the vehicle was originally placed in service, regardless of ownership.
For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after May
23, 2025, are covered by this special coverage and must be submitted using the labor operation codes
provided with this bulletin. Claims with repair orders prior to May 23, 2025, must be submitted to the
Service Contract provider.
Correction
Vehicle owners or lessees who paid for repairs referenced in this Special Coverage (“Customers”) are
eligible for reimbursement of their reasonable and customary expenses in accordance with the
procedures specified below. The conditional right to reimbursement is provided by GM solely in the
interest of customer satisfaction and is personal to Customers. Customers may not assign and GM
does not consent to any assignment of any Customer’s right to submit reimbursement claims, or to
receive reimbursement, or any other rights granted by this Special Coverage to any third party,
including but not limited to service contract providers, and this Special Coverage is not intended to and
does not confer any third party beneficiary, subrogation or contribution rights, or any other rights to
reimbursement, against GM, whether in law, equity or otherwise, on any third parties.
Dealers are to replace the engine. The repairs will be made at no charge to the customer.
Parts
Quantity
1
1
1
1
1
1
6
1
2
1
1
8
2
2
8
10
2
1
1
2
Part Name
ENGINE*
ENGINE*
BELT, ACSRY DRV PRIM
BELT, ACSRY DRV AUX
SEAL, A/C CMPR & CNDSR HOSE
SEAL, A/C CMPR & CNDSR HOSE
BOLT,ENG MT FRM SI
GASKET, ENG OIL CLR
RETAINER,TRANS FLUID CLR PIPE CONN
SEAL,EXH SYS
SEAL,EXH SYS
GASKET,INT MANIF
GASKET,W/PMP
SEAL,TRANS FLUID CLR PIPE FTG
BOLT,ENG MT ENG SI
BOLT,EXH MANIF
GASKET,EXH MANIF
PIPE,FUEL FEED INTER
PIPE,FUEL FEED INTER
SEAL KIT,F/INJR O-RING*
Part No.
12740076
19420611
12669858
12658178
13579648
13579649
11549180
23129010
22988272
15035747
15077362
12626354
12682391
85639955
11548998
11546600
12657093
12679463
12703668
12726902
Page 1 of 3
Special Coverage
N252494003 L87 Engine Loss of Propulsion
2
1
1
8
SEAL KIT,F/INJR O-RING*
GASKET,F/PMP BRKT
SEAL,OIL LVL IND
OIL,ENG 0W20 Dexos
4
COOLANT,ENG (1 GALLON) Dexcool
1
1
1
1
1
HOSE ENGINE OIL COOLER
RADIATOR*
RADIATOR*
RADIATOR*
RADIATOR*
19432442
12679867
24504031
19432331(US)
19432456(CA)
12346290(US)
10953464(CA)
85724972
85575817
85575818
85575815
85575814
*Note: Use the VIN and the GM Electronic Parts Catalog (EPC) to determine which part to order if two or more part
numbers are listed for the same part, as it may vary by vehicle options.
Reminder: Parts may be removed from SPRINT and Retail Inventory Management (RIM) and be non-returnable. Dealers
should review the affected parts to confirm RIM managed status. Parts may have quantity limiters in effect. There are a
small number of vehicles anticipated that will need this fix. Due to the limited initial parts availability, dealers are
encouraged not to order these parts for use as shelf stock.
Note: Choose the applicable one of the oil parts numbers above, Oil/Fluid will be supplied by your Oil Distributor.
Warranty Information
Labor
Operation
For vehicles
WITHIN the
New
Vehicle,
Powertrain
Limited
Warranty or
CPO
Powertrain
Warranty,
utilize the
regular
warranty
labor op.
Description
Engine Replacement
Escalade/Tahoe/Suburban/Yukon/Yukon XL
2WD w/ F47
2WD w/o F47
4WD w/ F47
4WD w/o F47
Silverado/Sierra
2WD
4WD
ADD TIMES (applies to all vehicles/option combinations):
Recover/Recharge R1234YF AC system
Recover/Recharge R134A AC system
Inspection
Labor
Time
Trans.
Type
ZREG
Net
Item
N/A
ZREG
N/A
ZREG
**
ZREG
***
18.3
18.2
18.4
18.3
18.5
18.6
1.2
0.3
0.2
For vehicles
OUTSIDE
of the New
Vehicle,
Powertrain
Limited
Warranty or
CPO
Powertrain
Warranty,
utilize labor
op 9900927
9900928
Diagnosis Only – No Further Action Required
9900929
Customer Reimbursement Approved
- For USA and Canada dealers only
- For Export dealers only
Customer Reimbursement Denied – For USA dealers only
9900930
Up To
1.0
N/A
0.2
N/A
Page 2 of 3
Special Coverage
N252494003 L87 Engine Loss of Propulsion
**
For USA and Canada: Submit the dollar amount reimbursed to the Customer in Net/Reimbursement. Submit $20.00
USD ($25.00 CAD) administrative allowance in Net/Admin Allowance.
For Export: Submit the dollar amount reimbursed to the Customer in Net/Reimbursement.
*** Submit $10.00 administrative allowance in Net/Admin Allowance.
Please Note: The above labor time(s) are published direct from the Labor Time Guide.
Service Procedure
1.
Verify any of the field actions (N252494000, N252494001, N252494002) have been completed and closed in IVH
prior to moving forward with this bulletin.
2.
A vehicle may come in with a seized engine, P0016 code, or a knocking noise.
3.
If a vehicle is exhibiting any of these conditions, check it for basic maintenance/neglect.
•
If the vehicle is not showing any obvious signs of neglect and has a seized engine or a P0016 code,
replace the engine. Refer to Engine Replacement in SI.
•
If the vehicle IS showing signs of neglect such as low/no oil level, has been hydrolocked, etc, the vehicle
is NOT covered under this special coverage.
•
If the vehicle has a knocking noise, run the L87 PicoScope Test per field action #N252494000.
Determine whether to replace the engine based on the results of that test.
•
If the vehicle has a valvetrain or other top end issue, it is NOT COVERED under this special coverage.
Courtesy Transportation – For USA & Canada
Courtesy transportation is available for Customers whose vehicles are involved in a product program and still within the
warranty coverage period. See General Motors Service Policies and Procedures Manual for courtesy transportation
program details.
Customer Notification
General Motors will notify Customers of this special coverage on their vehicle.
Customer Reimbursement
Customer requests for reimbursement of previously paid repairs to correct the condition described in this bulletin are to
be submitted to the dealer prior to or by May 31, 2026. See General Motors Service Policies and Procedures Manual
(USA & Canada) or local Policies and Procedures, for details.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of
conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained
technicians have the tools, equipment, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT
assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your dealer for information on whether your
vehicle may benefit from the information.
We Support
Voluntary Technician
Certification
Page 3 of 3
- 6X better wear protection on critical engine parts than...
- 1.3X better sludge protection than industry standards*
- 3X Stronger against viscosity breakdown than leading full...
- Protection for 10,000 miles between oil changes
- Meets or exceeds the following specifications: API SP/SN...
- Formulated for engines with 75,000 miles or more, Valvoline...
- Delivers 20% better wear protection and 15% better sludge...
- Extra detergents safeguard against friction, corrosion and...
- Advanced friction-fighting additives help maximize...
- Provides performance benefits for high mileage, new and...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: N252494003
Replacement Service Bulletin Number:
MFR Communication Date: 2025-05-23
MFR Internal Campaign ID/Software Version:
Communication Type: Service Campaign
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS
, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations
- 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
Last update on 2026-06-30 / Affiliate links / Images from Amazon Product Advertising API
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.