5.3L V8 SPI and Power Sunroof. Real Winner! Youll NEVER pay too much at Suburban Ford Mazda of Sterling Heights! Internet Special, Ask For The Outlet Sales Team!!!!! Pontiac has done it again! They have built some terrific vehicles and this terrific 2006 Pontiac Grand Prix is no exception! Be prepared to be transformed when you get behind the wheel and feel the power surge right into your very soul as you mash the gas and zoom off over the horizon. New Car Test Drive said, ...if the name sport-utility vehicle wasnt already taken for more cumbersome, truck-like machines, it could have been applied to the Grand Prix, which has a valid claim to both sport and utility. Its fun to drive in the twisties and you can stuff a nine-foot kayak into it and still close the trunk... J.D. Power and Associates gave the 2006 Grand Prix 4.5 out of 5 Power Circles for Overall Initial Quality Design.