# Service bulletin PIT5985K

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: 11027932
- Published by NHTSA: 2026\-02\-01
- Manufacturer's number: PIT5985K
- Manufacturer's date: 2026\-01\-27
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This PI provides diagnostics tips to dealership techs when trying to diagnose a CAN Bus communication issue after an event like a lightning strike, battery jump started backwards, failure over the air update, etc.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027932-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11027932-9999.pdf)

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

## Vehicles listed

- 2022 BRIGHTDROP EV600
- 2024 BRIGHTDROP ZEVO 400
- 2023 to 2024 BRIGHTDROP ZEVO 600
- 2025 to 2026 BUICK ENCLAVE
- 2021 to 2026 BUICK ENVISION
- 2020 to 2026 CADILLAC CT4
- 2020 to 2026 CADILLAC CT5
- 2021 to 2026 CADILLAC ESCALADE
- 2021 to 2026 CADILLAC ESCALADE ESV
- 2025 to 2026 CADILLAC ESCALADE IQ
- 2026 CADILLAC ESCALADE IQL
- 2023 to 2025 CADILLAC LYRIQ
- 2025 CADILLAC XT4
- 2024 to 2025 CHEVROLET BLAZER EV
- 2025 to 2026 CHEVROLET BRIGHTDROP 400
- 2025 to 2026 CHEVROLET BRIGHTDROP 600
- 2023 to 2026 CHEVROLET COLORADO
- 2020 to 2025 CHEVROLET CORVETTE
- 2026 CHEVROLET CORVETTE CONVERTIBLE
- 2026 CHEVROLET CORVETTE COUPE
- 2024 CHEVROLET CORVETTE E\-RAY
- 2026 CHEVROLET EQUINOX
- 2024 to 2026 CHEVROLET EQUINOX EV
- 2022 to 2026 CHEVROLET SILVERADO 1500
- 2024 to 2026 CHEVROLET SILVERADO 2500
- 2024 to 2026 CHEVROLET SILVERADO 3500
- 2024 to 2026 CHEVROLET SILVERADO EV
- 2021 to 2026 CHEVROLET SUBURBAN 1500
- 2021 to 2026 CHEVROLET TAHOE
- 2024 to 2026 CHEVROLET TRAVERSE
- 2024 to 2026 GMC ACADIA
- 2023 to 2026 GMC CANYON
- 2022 to 2026 GMC HUMMER EV PICKUP
- 2024 to 2026 GMC HUMMER EV SUV
- 2022 to 2026 GMC SIERRA 1500
- 2024 to 2026 GMC SIERRA 2500
- 2024 to 2026 GMC SIERRA 3500
- 2024 to 2026 GMC SIERRA EV
- 2021 to 2026 GMC YUKON
- 2021 to 2026 GMC YUKON XL

JSON: [/v1/bulletins/11027932](/v1/bulletins/11027932)

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