TRUCK WILL NOT IDLE, DIES WHEN I COME TO A STOP

Vapor lock again! Make sure the fuel lines are away from hot surfaces, or insulated.
Also, when it warms up, the automatic choke turns off, and the idle setting has to be set to run at that temp. There will be idle jets, maybe two, and idle stop setting for the linkage.

You can change a new one at hobd2

th sorry th
at answe dont make any sence considering he said it wont run when he touches gas.. how is he going to keep it reving if it stalla as soon as he touches the gas?????

Maybe the IAC is bad and can't control the idle. I know many have that problem but only effects D and not N or R. If your NSS (neutral safety switch) connects the ECU it could give false reading and ECU kills motor but unsure about that truck. Many cars it only allows the starter solenoid. 

check the Idle Stop Solenoid

it is the fuel pressure most likely have the fuel pressure checked

check your idle air control valve

I had the same problem 3 weeks ago with my 87 Toyota truck. I posted the problem here and the response I got was- On the passenger side rear of the carburetor is a cold air idle valve, it has a two wire pigtail on it, remove the valve and clean it out with carb cleaner. Then screw it back in and all should be well. I did this, not really expecting much. My truck started right up and has been idling with no problem since. Try this and also your fuel filter.

You may have a problem with idle speed control motor or ETC as GM calles it. here is a photo and a price from rockauto.com.
STANDARD MOTOR PRODUCTS Part # SA4
Motor Assembly $110.99

Sounds like the fuel filter is dirty and needing to be changed. It's cheap and easy to swap out.