I have a 2005Chevy Colorado and have the idle prob to when i come to a stop. Last summer i got a recall in for ENGINE INTAKE VALVE SEAT MAY WEAR. It says that will cause the prob.
Thats a special policy/recall that only gets performed if condition occurs. If you believe that this is your problem,,contact Chevy dealer and take it in for diagnosis.
yup took in to the dealership for that recall they said that wasnt it they cleaned it out it runsss a 100% better i was told any other prob to let them know.