2017 Malibu lt
2017 Lt 1.5T. Stupid stop has been disabled via hood latch plug. When car has sat 6-8+ hrs, idle speed fluctuates first couple 10+sec stops if not up to full temp. Stop, idle 800 drops to 500 for 5sec car surges/bucks, back up to 800, does 3-4 times. Or, stop after driven 60 for 1/2 mile, idle 500 drops to 300? and stays, can feel car surging against brakes. If I let off brake car lurches, stops, lurches. This continues at least 1min, runs fine otherwise. Dealer found no codes and could not duplicate. Can reconnect hood latch plug, car shuts off no idle problem. This issue is a minor inconvenience vs stupid stop. Had previous cars with IAC & MAFS issues, does not seem to match?