Service bulletins for the 1999 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.
28 on file from NHTSA, as of 2026-10-19.
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Only bulletins with component: Crankcase ventilation (PCV) are shown. Show all
| SB541002 | 1999-04-12. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE (PCV). SUBJECT ON INSTALLATION OF NEW-STYLE HEIGHT CONTROL VALVE FOR AL SUSPENSION ORIGINALLY BUILT WITH HEIGHT CONTROL VALVE AND SEPARATE PILOT DUMP VALVE. *TT |
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The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.