# Service bulletin PIT6132C

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: 11024703
- Published by NHTSA: 2025\-11\-02
- Manufacturer's number: PIT6132C
- Manufacturer's date: 2025\-10\-22
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

This Preliminary information communicates an issues with the HVAC making a hum buzz noise when the blower is set to a higher speed. Engineering is working on a new HVAC door seal material to correct the noise.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2025/MC-11024703-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2025/MC-11024703-9999.pdf)

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

## Vehicles listed

- 2021 to 2025 CADILLAC ESCALADE
- 2021 to 2025 CADILLAC ESCALADE ESV
- 2021 to 2025 CHEVROLET SILVERADO 1500
- 2021 to 2025 CHEVROLET SILVERADO 2500
- 2021 to 2025 CHEVROLET SILVERADO 3500
- 2021 to 2025 CHEVROLET SUBURBAN 1500
- 2021 to 2025 CHEVROLET TAHOE
- 2021 to 2025 GMC SIERRA 1500
- 2021 to 2025 GMC SIERRA 2500
- 2021 to 2025 GMC SIERRA 3500
- 2021 to 2025 GMC YUKON
- 2021 to 2025 GMC YUKON XL

JSON: [/v1/bulletins/11024703](/v1/bulletins/11024703)

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