2005 gmc envoy_sle
I have a 05 Envoy. I have been having problems with the heater, and now it has seem to move to more of the electrical in the truck. In the last week and a half I have had to use a battery charger twice to start the truck. Once I do that and give my dad a ride to work the battery will stay charged for the rest of the day. But then in the morning it will start hard again or not all. While driving if you turn the blower on the truck starts to surge and almost dies while I'm driving it. Any ideas to help would be greatly appreciated.