[GM-ACE]

FWIW, there are several factors as to why the steering wheel isn't centered after the alignment, the main being calibration. Either the tech didn't compensate the heads well or the alignment machine needs recalibration or the steering wheel just wasn't centered properly before he set the toe, which needless to say, is very important. And it wouldn't even matter if something were slightly bent on the car, so long as it could still be adjusted to within specs, of course. Now, if something's loose, totally different answer, you'd have a very hard time getting a straight steering wheel. Bottom line, if it ain't straight when they're done, they gotta do it again.