UPDATE!! Got it fixed!! I ended up dropping the tank when the inline filter up by the transmission didn't pan out to be nasty. When I dropped the tank,I found the 5/16 rubber line that goes from the tank to the electric pump in the back....was smushed in one place and rotten in another place with a hole in it. It was sucking air big time! I took the pickup out of the tank, and the sock looked like it had been drug down a red clay Georgia road for a hundred miles. Wouldn't clean out no matter how much I sprayed it with cleaner....so I tossed it and cut a filter in line between the tank and the electric pump. I also changed every piece of rubber fuel line on the beast! I cleaned the tank out,put new gas in it...and no more stumble! Took it up the toughest hills I could find, and no problems at all. Thanks for all the ideas.
