# Service bulletin PB\_738

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: 11029798
- Published by NHTSA: 2026\-03\-06
- Manufacturer's number: PB\_738
- Manufacturer's date: 2026\-02\-11
- NHTSA component: UNKNOWN OR OTHER

## NHTSA's summary

Pierce has implemented two updates to the MCC HVAC system to improve cab air flow and defrost functionality: • Improved windshield defrost vents for MCC HVAC system as a product enhancement • Implemented improved side recirculatory fans for MCC HVAC system as an optional upgrade

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029798-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11029798-9999.pdf)

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

## Vehicles listed

- 2002 to 2025 PIERCE ENFORCER
- 2002 to 2025 PIERCE IMPEL
- 2003 to 2025 PIERCE SABER
- 2002 to 2025 PIERCE VELOCITY

JSON: [/v1/bulletins/11029798](/v1/bulletins/11029798)

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