I have also had problems system. Sometimes when I go to change Sirius stations it will change to a completely different station (I will be on station 7 and go to 8 and it will change to Pandora live), this happens all the time.
I have had the Air lock up on multiple occasions. After I start the truck and let it run a minute the air will jump up to 79 on both sides, the front and rear defrost buttons are lite up and you can adjust nothing. the only way to fix this is to stop and turn off the truck then restart.
The Navigation is terrible also. I went out of town this weekend and put the address in both my phone and the truck. Now it was just over a 4 hour drive, my phone had it at 4 hr 8 minutes and the truck nav had it at 4 hr and 45 min. One time I had to go about 10 miles from my house, put address in nav system and it said 15 miles and it would take 25 minutes. This was on country roads so little traffic and few stops.