> There is a diagram of the fuel lines in the service manuals and there is a single page copy of it somewhere on the Internet, but I could not find
> it this morning.
>
> Over at gmcmhphotos.com if you search for "fuel tanks" and "fuel lines" you will come up with close to 200 photos other have posted about taking
> their tanks down.
>
> On the back of the dash fuel selector switch you will see 2 wires on one side and 3 on the other side. The 2 wire side is the fuel selector valve
> power. The 3 wire side is the gauge side. The center wire goes to the gauge. The wire opposite the valve power wire will be the Aux fuel sender
> since the valve gets power in the Aux position (I think its the top wire). The other wire (bottom?) will be the main tank fuel level sensor.
This is the diagram I used to fix screwed up fuel tank venting while installing 2 new fuel tank(s) plus I followed Matt's advice of placing the vent
lines as high as possible without droops. I drove the beast down to the gas station yesterday to "fill-er" up and it was the first time since
purchasing this turd that fuel did not come barfing out at me through the neck. The gas pump also stopped pumping fuel when it got a signal that the
tank was full. Imagine that - fuel tanks completely full!!!
--
Ed Clerkin | 1974 GMC Canyon Lands 26’
Central Coast CA
> it this morning.
>
> Over at gmcmhphotos.com if you search for "fuel tanks" and "fuel lines" you will come up with close to 200 photos other have posted about taking
> their tanks down.
>
> On the back of the dash fuel selector switch you will see 2 wires on one side and 3 on the other side. The 2 wire side is the fuel selector valve
> power. The 3 wire side is the gauge side. The center wire goes to the gauge. The wire opposite the valve power wire will be the Aux fuel sender
> since the valve gets power in the Aux position (I think its the top wire). The other wire (bottom?) will be the main tank fuel level sensor.
This is the diagram I used to fix screwed up fuel tank venting while installing 2 new fuel tank(s) plus I followed Matt's advice of placing the vent
lines as high as possible without droops. I drove the beast down to the gas station yesterday to "fill-er" up and it was the first time since
purchasing this turd that fuel did not come barfing out at me through the neck. The gas pump also stopped pumping fuel when it got a signal that the
tank was full. Imagine that - fuel tanks completely full!!!
--
Ed Clerkin | 1974 GMC Canyon Lands 26’
Central Coast CA
