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Service bulletin SB635006

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 id614517
Published by NHTSA2000-10-25
Manufacturer's numberSB635006
Manufacturer's date2000-08-08
NHTSA componentVISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:WINDSHIELD:ELECTRICAL HEATING ELEMENT

NHTSA's summary

CHASSIS EQUIPPED WITH A CABLE OPERTED HEATER CONTROL WATER VALVE, DIFFICULTY ADJUSTING CAB HEAT TEMPERATURE MAY BE EXPERIENCE. TO ELIMINATE THIS CONDITION, AN IMPROVED CAB HEATER TEMPERATURE CONTROL WATER VALVE IS AVAILABLE. *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

Glass, wipers and mirrors, Heating and air conditioning

Vehicles listed
MACK CH
MACK CX

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