Battery is good but no power at all to truck what could possibly be the problem.

. Test all under hood and under dash fuses with a test light or multimeter.

. Remove and fully charge the battery, which most auto parts stores will do for free. They will also test batteries for free. Clean battery terminals and cable connections. Examine cables for hidden corrosion and breaks. My bet is that the battery is bad.

Check the 175-amp mega fuse under the hood. Everything flows through that except starter. But starter won't engage if there's no power to ign switch.

Were there any recent repairs or events that could have damaged the electrical system?
Battery replacement or jump starting can sometimes cause fuses to become open and result in total vehicle power failure.
What other symptoms are you getting?