I have an '02 avalanche with an ongoing problem since new. While driving ( accelerating) truck pulls to left under moderate or heavy throttle. ( torque steer) I've taken it to several dealers with no end results. If I let off the gas, truck tracks straight, but as soon as I accel it pulls left. Any other concerns about this problem. They keep telling me there's nothing wrong with the truck. For some reason it just seems left steer dominant. There's seems to be more resistance turning the wheel to the right than the left. Also while riding over bumps, the steering wheel always kicks to the left with slight looseness in the wheel. I've driven several other avalanches and have not experienced this problem. What can it be Any suggestions??