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Service bulletin TSB 20-07

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 id10186660
Published by NHTSA2021-02-04
Manufacturer's numberTSB 20-07
Manufacturer's date2021-01-25
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Procedure for retrofitting units with an Onan 3.2 kW diesel generator to have hour meter function with Firefly system.

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.

Components

Electrical system

Vehicles listed
THOR MOTOR COACH CHATEAU CITATION2020
THOR MOTOR COACH DELANO2020 to 2021
THOR MOTOR COACH SIESTA2020
THOR MOTOR COACH TIBURON2020 to 2021

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