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Service bulletin CSB26-500-001

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 id11034846
Published by NHTSA2026-07-08
Manufacturer's numberCSB26-500-001
Manufacturer's date2026-06-11
Campaign id or software version26007
NHTSA componentUNKNOWN OR OTHER
Manufacturer's systemElectrical: V-Mux

NHTSA's summary

This service bulletin is about certain vehicles equipped with V-Mux Digital Truck Designer (DTD) multiplex system that may experience a situation where the node's internal control state will be out of synchronization with the other modules in the vehicle.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Vehicles listed
KME PANTHER2025, 2026
KME PREDATOR2025
SPARTAN FIRE GLADIATOR2024, 2025, 2026, 2027
SPARTAN FIRE METROSTAR2024, 2025, 2026, 2027

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