# Service bulletin 24\-NA\-239

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: 11013269
- Published by NHTSA: 2025\-01\-30
- Manufacturer's number: 24\-NA\-239
- Manufacturer's date: 2025\-01\-16
- NHTSA component: ELECTRICAL SYSTEM; SEATS; STRUCTURE:BODY; STEERING; ENGINE

## NHTSA's summary

This informational bulletin provides a guide on how to diagnose and test for vibrations utilizing the PicoScope.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11013269-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11013269-9999.pdf)

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

## Components

Body and frame, Electrical system, Engine, Seats, Steering

## Vehicles listed

- 2020 to 2025 BUICK ENCLAVE
- 2020 to 2022 BUICK ENCORE
- 2020 to 2025 BUICK ENCORE GX
- 2020 to 2025 BUICK ENVISION
- 2024 to 2025 BUICK ENVISTA
- 2020 to 2025 CADILLAC CT4
- 2020 to 2025 CADILLAC CT5
- 2020 CADILLAC CT6
- 2020 to 2025 CADILLAC ESCALADE
- 2020 to 2025 CADILLAC ESCALADE ESV
- 2020 to 2025 CADILLAC XT4
- 2020 to 2025 CADILLAC XT5
- 2020 to 2025 CADILLAC XT6
- 2020 to 2025 CHEVROLET BLAZER
- 2020 to 2024 CHEVROLET CAMARO
- 2020 to 2025 CHEVROLET COLORADO
- 2022 CHEVROLET EQUINOX
- 2020 to 2021 CHEVROLET EXPRESS
- 2023 CHEVROLET EXPRESS
- 2023 to 2024 CHEVROLET EXPRESS 2500
- 2020 to 2024 CHEVROLET EXPRESS 3500
- 2020 to 2024 CHEVROLET EXPRESS CUTAWAY VAN
- 2020 to 2025 CHEVROLET SILVERADO 1500
- 2020 to 2025 CHEVROLET SILVERADO 2500
- 2020 to 2025 CHEVROLET SILVERADO 3500
- 2020 to 2022 CHEVROLET SUBURBAN
- 2024 CHEVROLET SUBURBAN
- 2021 to 2025 CHEVROLET SUBURBAN 1500
- 2020 to 2025 CHEVROLET TAHOE
- 2020 to 2025 CHEVROLET TRAVERSE
- 2020 to 2025 GMC ACADIA
- 2020 to 2025 GMC CANYON
- 2020 to 2024 GMC SAVANA
- 2023 GMC SAVANA 2500
- 2023 GMC SAVANA 3500
- 2025 GMC SAVANA 3500
- 2020 to 2024 GMC SAVANA CUTAWAY VAN
- 2020 to 2025 GMC SIERRA 1500
- 2020 to 2025 GMC SIERRA 2500
- 2020 to 2025 GMC SIERRA 3500
- 2020 to 2025 GMC TERRAIN
- 2020 to 2025 GMC YUKON
- 2020 to 2025 GMC YUKON XL
- 2023 GMC YUKON XL 1500

## Recalls for the same vehicles and component

- [2026307](/recalls/tc/2026307.md), 2026-06-23: Steering
- [26V399000](/recalls/nhtsa/26V399000.md), 2026-06-23: STEERING
- [2025350](/recalls/tc/2025350.md), 2025-06-25: Structure
- [2025250](/recalls/tc/2025250.md), 2025-05-08: Seats And Restraints
- [25V299000](/recalls/nhtsa/25V299000.md), 2025-05-08: SEATS:FRONT ASSEMBLY:HEAD RESTRAINT
- [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
- [2025072](/recalls/tc/2025072.md), 2025-02-13: Structure
- [25V087000](/recalls/nhtsa/25V087000.md), 2025-02-13: STRUCTURE:BODY:DOOR
- [2025052](/recalls/tc/2025052.md), 2025-02-06: Structure

## Other bulletins for the same vehicles and component

- [N262570770\-03](/bulletins/11038560.md), 2026-10-16, Service campaign: ENGINE. Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to cut the thermal break tabs on the radiator.
- [N262570770\-02](/bulletins/11037486.md), 2026-09-25, Service campaign: ENGINE. Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to cut the thermal break tabs on the radiator.
- [N262570770\-01](/bulletins/11037367.md), 2026-09-18, Service campaign: ENGINE. Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to cut the thermal break tabs on the radiator.
- [N262570770](/bulletins/11037318.md), 2026-09-15, Service campaign: ENGINE. Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to cut the thermal break tabs on the radiator.
- [N262558680](/bulletins/11036186.md), 2026-08-13, Service campaign: SEATS. Customer Satisfaction Program. Certain vehicles listed above may have a condition in which the 3rd row head restraints may not lock in the upright position, or may not release from the upright position. Dealers will replace the 3rd row head restraints.
- [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.
- [N242468490\-02](/bulletins/11032963.md), 2026-05-28, Service campaign: ELECTRICAL SYSTEM. Certain vehicles may have missing cavity plugs from the rear chassis harness electrical connector. Dealers are to inspect the rear chassis harness and replace missing harness plugs as necessary.
- [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.
- [N262552610](/bulletins/11032438.md), 2026-05-07, Service campaign: ENGINE. Certain vehicles may have a condition that could cause the crankcase pressure sensor 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 6, 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 6, 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 crankcase pressure sensor as necessary. The repairs will be made at no charge to the customer.
- [N252529080](/bulletins/11030439.md), 2026-04-01, Service campaign: ELECTRICAL SYSTEM. Service Update. Certain vehicles listed above may be missing a high voltage header plug on the RESS battery pack drive motor connector. Dealers are to inspect the RESS pack connectors and install the proper HV Header Plug if missing.

JSON: [/v1/bulletins/11013269](/v1/bulletins/11013269)

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