Truck won't idle

Check for vacume leaks,then check the idle air control valve.

Thanks I will look at that... I just ordered a Crankshaft Position Sensor... Do you think it might be that??? I also used booster cables the other day to charge another car and now I read that you shouldn't use them with any car with a computer... It ran fine for a few days after that... I know the crankshaft sensor was bad or going though...

You could try the sensor,but IMO if bad would give you a no crank issue or skipping engine,if engine runs good with no skip with foot on gas,and only shuts off when you let off gas,check for what i said above.

Oh one more thing comes to mind,if you have not change your fuel filter may be time.