Vehicle report
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.
26-003
This bulletin describes the procedure to relocate the LP solenoid power source from the chassis battery to the house battery on Lineage M-Series 25FW units equipped with an LP solenoid. The relocation uses retrofit harness EL-0189.
26-004
This bulletin describes the procedure to install a Grand Design RV – supplied diode into the water pump control circuit of the Firefly Emprise electrical system on affected ProMaster LVP units. The diode prevents excessive current in the water pump control circuit that can damage the Firefly circuit board.
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.