Truck runs smooth but when you stop at a stop light or stop sign it will die sometimes

Depends on what you mean by rough. Could be a cylinder misfire.They sometimes are not noticed as engine speed increases during driving or under light load as when idling in neutral but at idle under load as when stopped at a light in drive became noticable.
Could also be running rich. The causes of either are too numurous to list.Consult a good mechanic who can actually see and hear the problem to put you on the right track.

Check engine for vacuum leak if no leak found a check map sensor

Crank shaft sensor.

have your battery checked my dodge truck does the same thing.

just a thought check the egr system,

first thing to do is clean the throttle body. it will probably cure the stall and **** problem

When i'm stopped at a light or sign my cars rpm's go down and my car shakes and sometimes either acts like it wants to die or just dies

possibly a bad module------cracked---or???? In any case you may get expansion as engine compartment warms up----module shuts you down. Sometimes really hard to diagnose and just putting in a new module is "spendy"----especially if it turns out not to solve the problem!

sounds like the EGR valve is sticky, take a small screw driver and tap the valve when the engine is at idle and you will notice a change in the way the engine runs, if the vehicle smooths out disconnect the valve and drive the vehicle and it should not cut off please let me know and dont forget to rate me!!

simple , new fuel pump!!!