Well the truck has been running perfectly up to today. It has a H&S Minnie Max, straight exhaust, and an intake. I've been running it on the mild setting and not hammering it. Started it up today, let it warm up and right off the bat we noticed the air conditioning was not working right. Pulled out of the drive way and she sounded like it was not in gear, (making noise but not going anywhere) We turned around parked and shut her down. I did a visual of the engine compartment and found nothing obvious wrong. Tried to start it again and nothing. All the lights on the dash come on as well as the fan but when you turn the key its like a drain on the system. Help I'm not a mechanic by any means, any ideas?