Old as dirt,but still above it

[Sgt Gus]

Even when these trucks were new, there were issues with the switching systems. Dad's 75 GMC Sierra Classic had a "dealer" installed (actually done by a subcontractor shop off premises) second tank and he had trouble with that the whole 5 years he drove that truck.

Oh oh. Our passenger side tank wasn't working well. It would students and start to die. I was guessing in tank fuel pump to try 1st. Could be other things?

 

[HotWheelsBurban]

Oh oh. Our passenger side tank wasn't working well. It would students and start to die. I was guessing in tank fuel pump to try 1st. Could be other things?

Is there a fuel pump in the tank on these? I thought the carbed trucks just had the regular one on the side of the block. From what I've read,seems like the switching valves are often the problem....

 

[Sgt Gus]

I was jumping in on interesting thread, about our truck. We have dual tank TBI. So yes, fuel pump is elect in tank.

 

[Mr Clean]