Technical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
TSB23-540-001
Service Bulletin/Repair Instructions
This service bulletin is about certain vehicles equipped with 92 inch or longer roof mounted light bars that could experience fracture of the light bar mounting brackets, as well as provides instructions to replace the light bar bracket with improved bracket design.
TSB23-260-001
Service Bulletin/Repair Instructions
This service bulletin is about the power steering fluid level sensor could exhibit leaks where sensor seals against power steering reservoir and provides instructions on replacing current power steering level sensor with improved sensor design.
TSB23-520-001A
Service Bulletin/Repair Instructions
This service bulletin provides instructions to inspect and rewire 120V box in accordance with diagram. Revision to the previous bulletin released.