Hey guys - Hope you can provide some insight on this issue. I have a 2009 Hummer H3T and I just love this Nav unit. Ever since I had this unit installed it does not always power on when the truck is started. Most of the time the unit does power on but maybe 3 out of 10 times the truck will be started and the unit is not on. I have taken it back to the installers and they have said that they have seen this before in other GM vehicles and has something to do with the internal amp? They suggested that I purchase a new separate amp, nothing spectacular, and the problem would go away. Does th