GM Repair Problems? Ask GM Repair Expert Now.
I am sorry your having this problem
are there any codes being set in the computer history or current ?
will it only do this at idle ?
will it run fine off idle and down the road ?
there is NO fuel or gas smell under the hood or physically at the injectors ? or fuel rail ?
if you unplug the ECT engine coolant temp sensor will it still do this at idle ?
change the sensor and see if it fixes this problem