Not a question for the K5. This is in regards to a post I made in the "other rides" forum titled "Hesitation." Seems like I saw someone say something about IACs last week or so. Could this unit contribute to hesitation to about 30 mph? Car runs great after about 30 mph. Highway performance is excellent. Were these IACs known for going bad on GM cars in the late 80's? Are these units strictly for idle (not touching the throttle), so the car doesn't die. Sometimes the car dies after coming to a stop in reverse. All the symptoms I am having are in that post noted above. Thanks in advance for ANY input on what could be causing this. I am tired of taking it to the dealership every year and half to have them "re-learn the IAC counts" ... whatever that means.