So I'm in need of some brakes and instead of getting ripped off at a shop I might just do it on my own. However, apparently there are different size brakes on the 99 suburbans SLT 4x4 k1500 5.7l v8 engine? I figured there would only be one brake size for the slt/5.7l/4x4 but I was wrong. Is there something I can look at in the vin to make sure I order the right size pads and shoes? or do I have to check the old fashioned way by measuring? Thanks.