Accelerator Pedal Sensor problems of the 2007 Chevrolet Tahoe

My wife was accelerating from our street onto a major highway when the engine nearly shut down. Her speed was reduced to just 5 mph and the dashboard flashed engine power reduced, service stabilitrak, and service traction control. Unfortunately, she knew exactly what this was since this is the third time this has happened in this car in the last 18! we took it to our dealer and they tested the vehicle and diagnosed that the accelerator pedal sensor had failed again! we are extremely uneasy with the car now since each time this has occurred, it has been while one of us was accelerating onto a highway or interstate. On the previous occasion, she had to quickly move away from oncoming traffic. . . With our children in the car. The dealer indicated that they see this problem very often, but not this much in one car. This is obviously a defective part and should be checked into immediately.