I'm new to the forums...Currently driving an 05 Malibu LT and I seem to be having some issues with the unit itself...
Within 10 minutes of plugging it in, the unit began to flash SelfCal and then Service Required...After searching around for a bit I gathered some imformation:
The voltage coming through the lighter is between 12.5-13.7 constant while car is running.
The firmware is 6.1 (Like i said its BNIB)
I purchased the unit from a friend that works for a distributor of Bel. Figured it was my best bet.
I live in CT so, max car temp with windows up in direct sunlight most likely around 110*-120*...So it's not really an overheat issue IMO.