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Service bulletin 9901B

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 id604714
Published by NHTSA1999-05-10
Manufacturer's number9901B
Manufacturer's date1999-03-11
Replaces9901A
NHTSA componentELECTRICAL SYSTEM:IGNITION

NHTSA's summary

FIELD CAMPAIGN INFORMATION ON ISC CAPS RATE SHAPE TUBE AND DISTRIBUTOR INLET. *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, Ignition

Vehicles listed
CUMMINS CUMMINS

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