I think something may be wrong with my 2006 2500HD company truck. From a standing start, with no cargo,it will not squeak the tires when I stomp on it. It does not, as far as I can tell,have the traction control option. There is no defeat button on the dash, and it will not do it when locked in 1st gear. btw it is a 2wd/auto/6.0 litre/4.10 gears/factory locker. Tell me this is not normal please. Also, 13.4 mpg combined city/hwy, not so bad if it hauls ass, but it don't.