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Service bulletin 301K2501

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 id631809
Published by NHTSA2002-06-20
Manufacturer's number301K2501
Manufacturer's date2001-12-01
NHTSA componentPOWER TRAIN:MANUAL TRANSMISSION

NHTSA's summary

SUBJECT REGARDING A VALVE BODY KIT FOR ALL 1000/2000/2400 SERIES. *SLC

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

Transmission and driveline, Manual transmission

Vehicles listed
GMC GM

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