# Service bulletin PIT6352

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: 11015646
- Published by NHTSA: 2025\-03\-17
- Manufacturer's number: PIT6352
- Manufacturer's date: 2025\-03\-12
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This Preliminary information communicates A vehicle may come to the dealer with a service high voltage message and P29BB. The dealer is advised not to replace the heater. They are to clear the code and advise the customer that engineering is working on a design improvement.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11015646-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11015646-9999.pdf)

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

## Trouble codes named

P29BB

## Vehicles listed

- 2025 CADILLAC LYRIQ
- 2025 CADILLAC OPTIQ
- 2024 to 2025 CHEVROLET BLAZER EV
- 2024 to 2025 CHEVROLET EQUINOX EV

JSON: [/v1/bulletins/11015646](/v1/bulletins/11015646)

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