are canadian built k10 (specificly the short bed) and american built trucks differant. for example my canadian k10 4x4 swb sits around 3 inches higher then any other k 10 ive parked near and as far as i kno it doesnt have a aftermarket lift it does have 3 inch blocks under the springs in the rear but ive been told that was factory from canada? is this true are there any other things that r differant