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Service bulletin 9721B

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 id606381
Published by NHTSA1999-08-18
Manufacturer's number9721B
Manufacturer's date1997-10-24
NHTSA componentELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

NHTSA's summary

INFORMATION ON SERVICING M11/N14 CELECT PLUS IN HEAVEY DUTY TRUCKS WITH LEECE-NEVILLE OR DELCO ALTERNATOR. *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

Electrical system, Alternator

Vehicles listed
CUMMINS CUMMINS1997

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