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Service bulletin 120401

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 id619398
Published by NHTSA2001-05-29
Manufacturer's number120401
Manufacturer's date2001-04-12
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM:FAN

NHTSA's summary

SUBJECT REGARDING FLEXIBLE FAN BLADES. *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

Engine, Cooling fan, Cooling system

Vehicles listed
GMC GMC TRUCK1975
GMC PICK UP1973 to 1979

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