Repaired 3 times check Engine never goes away. Inside Engine material is plastic imagine! on a 260 degree Hot Engine. that is why it constant need repair. This car should had been a recall. It stop in the middle of the road without warning. Don't bother to call GM they won't help you, this has been put under the carpet rather then recall. (IS Cheaper).
Replace the plastic intake with Metal like a normal car, Left & Right intake better quality hose rubber not plastic.