Smallcan an idle air control valve problem make my 1995 gmc truck die at stops

Usually there are trouble codes that give clues as to what needs to be TESTED so the actual problem can be discovered. Good luck!

Im sorry i thought I already put that i did replace the idle air control and it made no difference at all

With key on - *TEST* the Throttle Position Sensor - should have under one volt at closed throttle to over four volts at wide open throttle. TPS also has input on IAC position ! Trouble codes are very helpful. May still have vacuum related problems or incorrect base idle. When these problems are presented at the shop - the first thing I do is a complete scan test - then I can use the scanner for further diagnosis .. That is what really should have been done here to start with .. However I do understand attempting diy repair to try and save a buck or two - BUT - sometimes - just the opposite happens.

You may already know how to gather trouble codes on OBD 1 but below is a link that may help: https://www.youtube.com/watch?v=UIKdbTFvyUU Post ALL trouble codes here for more repair suggestions - - IF desired.