A constant knocking/ rattling noise coming from the driver side tire. I took it to 2 different GMC dealerships. The first dealership said the problem was a loose heat sheild rattling against an electrical box. Yeah right $40 afterwards the knocking noise was still there. I took it to a different dealership first they said it was my vehicle's stablizer I knew that the Aztek makes a constant vibrating noise when you first turn on the car. So then after a test drive with the mechanic who heard the noise said it was a loose strut on the driverside that they tightened up. Well $80 afterward the knocking noise is there. Not to mention I already had to replace the driverside outer tirerod which cost $40. To add more fuel to the fire I own an extended warranty on the Aztek which has a standard $100 deductible and I find it funny that when both times I brought my Aztek to a dealership the supposed fix cost under $100 dollars both time.