No power .no lights no startis there a main fuse for my truck

Hello, yes, there is a fuse that when blown would interrupt power - but this fuse typically would only blow when there is an incorrect jump start - reversed polarity. It sounds like you have another issue with your vehicle - starting with then battery and charging system. To me, it sounds like your battery is currently dead and that it happened due to a larger charging system problem. Testing is needed. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops