Your truck have much rot? Chevy's love to rot from the inside out. If yer anything like me you'll just keep throwing parts at it. Doesn't hurt anything but yer wallet. Trace everything, fill it up and try your damn hardest to find a leak. Just had to replace my power steering pump not too long ago after replacing all the hoses...and then the cooler...finally the pump. Good luck with it.
What kind of electrical issues have you had?