Service bulletins for the 1994 Mack CH
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.
27 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| P-1670 | 2009-02-24. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:DIESEL. MACK TRUCK: UNIT INJECTOR AND EXHAUST ROCKER ARMS, COMBUSTION SEALING WASHER AND UNIT INJECTOR YOKE REPLACEMENT. MODEL AND MODEL YEARS UNKNOWN. *PE |
|---|---|
| 09B014 | 1997-07-24. Service bulletin. STEERING:HYDRAULIC POWER ASSIST SYSTEM. POWER STEERING SEAL UPDATE SHEPPARD M100 STEERING GEAR USED ON CH MODEL. *TW |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.