Hey all. Got a 17 sport with the coyote. A couple days ago i went to start my truck in the -40 weather here in central British Columbia. it started fine and i left it alone for 10 minutes to warm up. when i jumped into the truck the radio was dead. drove it around all day Christmas shopping and plugged the block heater in overnight. the next morning the battery was stone dead. put a charger on it and got it running a few hours later. went and bought a new battery figuring that my 5 year old one was pooched. well this morning its stone dead again. on the charger and now im searching for a parasitic drain. any ideas would be appreciated. do you think its related to the stereo and any quick fixes like which fuse to pull till i can get it diagnosed in about10 days.