# Service bulletin 18\-NA\-073

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10228886
- Published by NHTSA: 2023\-01\-06
- Manufacturer's number: 18\-NA\-073
- Manufacturer's date: 2022\-12\-14
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10228886-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10228886-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine

## Vehicles listed

- 2016 to 2019 BUICK CASCADA
- 2015 to 2023 BUICK ENCLAVE
- 2015 to 2022 BUICK ENCORE
- 2023 BUICK ENCORE
- 2020 to 2023 BUICK ENCORE GX
- 2016 to 2023 BUICK ENVISION
- 2015 to 2019 BUICK LACROSSE
- 2020 BUICK LACROSSE
- 2015 to 2020 BUICK REGAL
- 2018 BUICK REGAL TOURX
- 2015 to 2017 BUICK VERANO
- 2015 to 2019 CADILLAC ATS
- 2015 to 2018 CADILLAC ATS\-V
- 2020 to 2023 CADILLAC CT4
- 2020 to 2023 CADILLAC CT5
- 2015 CADILLAC CT6
- 2016 to 2020 CADILLAC CT6
- 2021 CADILLAC CT6
- 2015 to 2019 CADILLAC CTS
- 2015 to 2016 CADILLAC CTS\-V
- 2018 CADILLAC CTS\-V
- 2015 to 2023 CADILLAC ESCALADE
- 2015 to 2016 CADILLAC ESCALADE ESV
- 2017 to 2023 CADILLAC ESCALADE ESV
- 2021 CADILLAC ESCALADE NA
- 2015 to 2016 CADILLAC SRX
- 2017 to 2019 CADILLAC SRX
- 2018 CADILLAC XT4
- 2019 to 2023 CADILLAC XT4
- 2015 to 2016 CADILLAC XT5
- 2017 to 2023 CADILLAC XT5
- 2020 to 2023 CADILLAC XT6
- 2015 to 2019 CADILLAC XTS
- 2020 CADILLAC XTS
- 2015 CHEVROLET 3500
- 2016 CHEVROLET 3500
- 2017 to 2019 CHEVROLET 3500
- 2020 CHEVROLET 3500
- 2021 CHEVROLET 3500
- 2022 CHEVROLET 3500
- 2016 CHEVROLET 4500
- 2017 to 2019 CHEVROLET 4500
- 2020 CHEVROLET 4500
- 2022 CHEVROLET 4500
- 2017 to 2022 CHEVROLET 4500HD
- 2017 to 2022 CHEVROLET 4500XD
- 2017 to 2022 CHEVROLET 5500HD
- 2018 to 2022 CHEVROLET 5500XD
- 2019 CHEVROLET 6500
- 2022 CHEVROLET 6500HD
- 2015 to 2018 CHEVROLET AVEO
- 2019 to 2023 CHEVROLET BLAZER
- 2018 CHEVROLET C3500
- 2015 to 2023 CHEVROLET CAMARO
- 2015 to 2018 CHEVROLET CAPRICE
- 2015 to 2017 CHEVROLET CAPRICE POLICE PURSUIT
- 2015 to 2018 CHEVROLET CAPTIVA
- 2015 to 2017 CHEVROLET CHEVEROLET SS
- 2017 CHEVROLET CHEYENNE
- 2015 to 2016 CHEVROLET CITY EXPRESS
- 2018 CHEVROLET CITY EXPRESS
- 2015 to 2017 CHEVROLET COBALT
- 2015 to 2023 CHEVROLET COLORADO
- 2015 to 2023 CHEVROLET CORVETTE
- 2015 to 2019 CHEVROLET CRUZE
- 2015 to 2023 CHEVROLET EQUINOX
- 2015 to 2021 CHEVROLET EXPRESS
- 2023 CHEVROLET EXPRESS 2500
- 2023 CHEVROLET EXPRESS 3500
- 2016 CHEVROLET EXPRESS 4500
- 2018 CHEVROLET G4500
- 2015 to 2020 CHEVROLET IMPALA
- 2016 to 2019 CHEVROLET LOW CAB FORWARD 3500
- 2016 to 2017 CHEVROLET LOW CAB FORWARD 4500
- 2016 to 2017 CHEVROLET LOW CAB FORWARD 5500
- 2018 CHEVROLET LOW CAB FORWARD 6500
- 2015 to 2023 CHEVROLET MALIBU
- 2016 to 2019 CHEVROLET MALIBU HYBRID
- 2015 to 2016 CHEVROLET N300
- 2018 CHEVROLET N300
- 2017 CHEVROLET N300 MAX
- 2021 CHEVROLET ONIX
- 2016 CHEVROLET OPTRA
- 2017 CHEVROLET ORLANDO
- 2016 to 2018 CHEVROLET S10
- 2015 to 2023 CHEVROLET SILVERADO 1500
- 2015 to 2023 CHEVROLET SILVERADO 2500
- 2015 to 2023 CHEVROLET SILVERADO 3500
- 2019 to 2023 CHEVROLET SILVERADO 4500
- 2019 to 2021 CHEVROLET SILVERADO 5500
- 2023 CHEVROLET SILVERADO 5500
- 2019 CHEVROLET SILVERADO 6500
- 2021 to 2023 CHEVROLET SILVERADO 6500
- 2015 to 2020 CHEVROLET SONIC
- 2015 to 2022 CHEVROLET SPARK
- 2018 CHEVROLET SS
- 2015 to 2023 CHEVROLET SUBURBAN
- 2021 to 2022 CHEVROLET SUBURBAN 1500
- 2015 to 2023 CHEVROLET TAHOE
- 2015 to 2016 CHEVROLET TAHOE POLICE PURSUIT
- 2017 to 2020 CHEVROLET TRAILBLAZER
- 2021 to 2023 CHEVROLET TRAILBLAZER
- 2015 to 2023 CHEVROLET TRAVERSE
- 2015 to 2022 CHEVROLET TRAX
- 2019 CHEVROLET duplicate SILVERADO 5500
- 2015 to 2023 GMC ACADIA
- 2015 to 2023 GMC CANYON
- 2015 GMC DENALI
- 2017 to 2018 GMC G3500
- 2015 to 2023 GMC SAVANA
- 2015 to 2017 GMC SAVANA 1500
- 2015 to 2018 GMC SAVANA 2500
- 2015 to 2018 GMC SAVANA 3500
- 2015 to 2023 GMC SIERRA 1500
- 2015 to 2023 GMC SIERRA 2500
- 2015 to 2023 GMC SIERRA 3500
- 2015 to 2020 GMC SIERRA DENALI
- 2015 to 2023 GMC TERRAIN
- 2022 GMC TERRAIN NA
- 2015 to 2023 GMC YUKON
- 2015 to 2019 GMC YUKON DENALI
- 2015 to 2018 GMC YUKON DENALI XL
- 2015 to 2023 GMC YUKON XL

## Recalls for the same vehicles and component

- [2025225](/recalls/tc/2025225.md), 2025-04-24: Engine
- [25V274000](/recalls/nhtsa/25V274000.md), 2025-04-24: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
- [21V346000](/recalls/nhtsa/21V346000.md), 2021-05-13: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE \(ECU/ECM\):SOFTWARE
- [2019449](/recalls/tc/2019449.md), 2019-09-06: Engine
- [19V642000](/recalls/nhtsa/19V642000.md), 2019-09-06: ENGINE; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
- [19V328000](/recalls/nhtsa/19V328000.md), 2019-04-25: ENGINE
- [2014577](/recalls/tc/2014577.md), 2014-12-18: Engine
- [14V007000](/recalls/nhtsa/14V007000.md), 2014-01-13: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM

## Other bulletins for the same vehicles and component

- [N262576260](/bulletins/11038468.md), 2026-10-15, Service campaign: ENGINE. General Motors has decided to conduct a Voluntary Emission Recall. Certain vehicles may have a condition that could cause a small exhaust leak at the catalytic converter inlet. Dealers are to replace the catalytic converter inlet clamp and to inspect the catalytic converter – replacing it if damage is observed. The repairs will be made at no charge to the customer.
- [N242484750\-02](/bulletins/11036594.md), 2026-09-01, Warranty extension: ENGINE. Special Coverage. Certain 2022 model year Buick Encore GX and Chevrolet Trailblazer vehicles, equipped with a 1.2L engine, may have a condition that could cause the turbocharger to fail. If this condition occurs, the Malfunction Indicator Lamp \(Check Engine Light\) will illuminate, and a diagnostic trouble code will set. Additionally, a message may be displayed indicating the vehicle’s available engine power is reduced. This special coverage covers the condition described above for a period of 15 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 January 14, 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 January 14, 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 turbocharger as necessary. The repairs will be made at no charge to the customer.
- [N262546590\-01](/bulletins/11035019.md), 2026-07-15, Service campaign: ENGINE. Certain vehicles listed above, may have a condition where coolant leaks from the radiator hose quick connect at the radiator inlet. This special coverage covers the condition described above for a period of 5 years or 60,000 miles \(100,000 km\), 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 July 14, 2026, 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 July 14, 2026, 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 remove the inlet hose and replace the seal. The repairs will be made at no charge to the customer.
- [N262552620](/bulletins/11032588.md), 2026-05-11, Service campaign: ENGINE. Certain vehicles may have a condition that could cause the cylinder 2 glow plug to fail. If this failure occurs, the Malfunction Indicator Light \(Check Engine Light\) will illuminate and a diagnostic trouble code will set. This special coverage covers the condition described above for a period of 15 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 11, 2026, 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 11, 2026, 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 cylinder 2 glow plug as necessary. The repairs will be made at no charge to the customer.
- [N262548050](/bulletins/11031551.md), 2026-04-24, Service bulletin: ENGINE. This message is to inform dealers that Special Coverage N262548050 is being temporarily suspended for the models above. Involved vehicles will be temporarily removed from IVH. Dealers will be notified when repairs can be resumed. We apologize for any inconvenience this situation may cause.
- [N262548050](/bulletins/11031510.md), 2026-04-23, Service campaign: ENGINE. Certain vehicles, may have a condition that could cause the Catalytic Converter to fail. If this failure occurs, the Malfunction Indicator Light \(Check Engine Light\) will illuminate, and a diagnostic trouble code will set. Dealers are to replace the Catalytic Converter as necessary. The repairs will be made at no charge to the customer.
- [N252494003\-02](/bulletins/11027714.md), 2026-01-21, Service campaign: ENGINE. 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.
- [PIE0815A](/bulletins/11026107.md), 2025-12-04, Service bulletin: ENGINE. This engineering information \(EI\) closure ends the need for gathering further information from technicians/field in regard to the Service Engine Soon \(SES\) Lamp illuminated on DIC, Suspect Non\-OE Catalytic Converters and/or Exhaust Systems w/DTCs P013F, P014A, P014B and/or P013E Set.
- [25\-NA\-147](/bulletins/11026093.md), 2025-12-04, Service bulletin: ENGINE. this bulletin provides a procedure to verify if the ECM is at the latest update before testing the fuel system.
- [00\-06\-01\-026R](/bulletins/11026017.md), 2025-12-03, Service bulletin: ENGINE. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.

JSON: [/v1/bulletins/10228886](/v1/bulletins/10228886)

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