I have a 1986 k1500 4wd 2 gas tanks I want to put a single setup for each one what do I need?

You don't need to remove the tank, just use a siphon hose to remove the gas into a gas can and get rid of it that way. You an get hose and a suction bulb from an auto parts store so you don't have to suck the gas up with your mouth. Then just put the proper ends into the tank and can, squeeze the bulb until gas is transferring, when the can is near full pull the hose from tank. This works perfectly every time.

there is one in the carburetor where the fuel line goes into it and there is also one located on the frame rail left side. You can buy on eBay a diesel transfer pump and take a clear hose and put it into the gas tank and pump some fuel out into a bucket, or just get a install a petcock and drain fuel into a bucket. Hope this helps Tim

I had this problem and for me it required changing the fuel gauge.

Yes, it has an in-line fuel pump and one in the gas tank.

Have you checked with any radiator repair shops. What seems to be the problem with the old one?

is the fuel pump switch inside the cab tripped or has burned connector?

Does it have a single or dual tank. Carb or Fuel Injection?

best bet would be to drop the tank and clean it out
they tend to get rust inside the tank when they sit this long if you decide to drop the tank and find rust inside take a 3 ft piece of heavy chain and shake it around inside the tank to loosen all the rust and clean the rust out really well before putting the tank back in

It's inside the gas tank. Took me about 20 minutes to drop the tank. 2 bolts that hold it up and undid 2 small bolts on the heat flange that seemed in the way. You should also take out the one small bolt on the driver side holding the brake cable up. You have to anyway to get the tank back in.
I got a pump online for $50. Pump only and it took about 10 minutes this morning to put it in the original bracket out of my fuel tank. So I say go with pump motor only and save big bucks.
TIP: For those of you who want to check if its your fuel pump or fuel relay. There are 2 easy places to do this. One is at the gas tank itself. Under the car they dropped the wiring harness down and put a connector in a bracket on the back of the gas tank. The second one is behind the rear seat back. Lift out the bottom seat pushing the 2 levers and then there are 2 bolts to take out to remove the rear seat back. Then you will see a connector on the passenger side up high. You can use either of these connectors to check if you got power when the key hits the start (engine cranking) position. If you do the relay is good. You can run power from a battery/charger to the fuel pump and see if it works.

did you try taking the pumps out and trying them individualy? cuz they myt b broken.. and besides you dont need to put more gas cuz you should hear them turn on especialy with the tank open./ . . . . cuz if all the wires are ok, its gota be a prob with the pums. . and you do have an old van. . 8)