Ive had nothing but problems. I bough the acadia from an auction I dont know the history on it at all. Anyways so far I have replaced crank shaft sensor, MAF sensor, throttle body with tps sensor. I started out with 19 codes after all that along with oil change and transmission drain and fill and pcv valve I ended up with 9 codes misfire cylinder 2 and the cpdes that come along with it so swapped coil for cylinder 2 with 4 and resulted in dead coil. So I replaced the coil and replaced spark plugs with acdelco gaped at .044 now im getting multiple misfires but runs decent around 15 to 40 45 and seems to not want to go past 80 mph.shifting is sporadic sometimes shifts fine other times rpm's stay up wont shift or is bogged down and won't shift up reverse has like no power and is gutless off the line or uphill. Any help anyone experianced any of this. O ya i also replaced the torque mount under the fuse box.