why is it that majority of the smog check stations in CA charge extra money for SUVs & full size trucks? i went to 4 different smog places today & all 4 places said they either had to charge additional $10, $15 & even $20 dollars because it was a full size truck. so i asked them why the extra charge? none of the technicians can give me an explanation except "it's a full size truck"... wth?!?! i can understand parking lots charging a little more because of the space that full trucks take up. but to charge extra $$ for a smog test because it's a full size truck. come on now!!! is it b/c it requires more walking distance to get from the smog computer to the exhaust pipe? haha.