Noticed the other day I was losing fuel out the top of the fuel tank when I was at the pump topping it off. Is there a common part I can go get ahead of taking the bed off? I've had to do this once before a few years back when the sending unit took a dump, but it's never leaked before or since. Wifey has filled it the last few times and said the mileage was crappy, I wondered if I was losing fuel, but couldn't find it till I was at the pump myself. Ol' red sits a lot during the winter months unless it snows, then she drives it. I'm thinking something dry-rotted.

 

Ive got a pretty big leak too - except its at the front. I was working on it last night but its not really going to be a quick fix.

Instead of raising the bed I would drop the tank. Get the tank good and empty and lower it with ratchet straps or with your floorjack and a good chunk of lumber.