My Chev Pick up will not start. I have a new battery, but have no power to anything. How can I find the prolblem?

Begin by testing all under-hood and under-dash fuses with a test light or multimeter. Hopefully, this will help:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-honda-civics-46563-3.html#post252145

If all fuses and batt are good check the wires at the starter sometimes there are wires at the starter motor that go inside the car. They will be on the same post as the batt cable