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Service bulletin 604

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10007008
Published by NHTSA2004-05-22
Manufacturer's number604
Manufacturer's date2004-04-07
NHTSA componentSERVICE BRAKES, AIR:DISC

NHTSA's summary

AIR DISC BRAKES FOR MODEL 379-FAMILY VEHICLES. PETERBILT. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Brakes

Vehicles listed
PETERBILT 3791987, 1988
PETERBILT 3791991
PETERBILT 3791995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
07V0440002007-02-12. SERVICE BRAKES, AIR
20040662004-02-18. Brakes
03V3430002003-09-15. SERVICE BRAKES, AIR:SLACK ADJUSTERS
20021612002-09-11. Brakes
02V2410012002-09-10. SERVICE BRAKES, AIR:CONTROLS:HAND CONTROL/VALVE
02V0180012002-01-15. SERVICE BRAKES, AIR:SUPPLY:CHECK VALVE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.