do we have pontiac 2007 4*4
It's called AWD or All Wheel Drive. The vehicle used it's front wheels for most of the time, so FWD. When the vehicle detects wheel slippage, the rear wheels are called upon to engage so you have better traction and you don't spin out. It;s all controlled behind the scenes without your input. It uses information from your ABS brake system.sensors and the ECM or cars computer.