Most just ask that you measure from the ground to the level part of top of tire,then type in the numbers,MOST tuners offer this feature...My speedo will say 73 when I am actually doin 70[verified by my GPS and the Superchip plugged in the OBDII] 
__________________ 06.LBZ GMC[SLE1] 4x4 ....114k miles,4136 hours[Modded a bit.LOL]
Suncoast Stage V tranny!!,Mag/Hytec pan,1056TC,billet output...
2002 GMC ex cab sb 5.3 1500 2wd
1987 Monte Carlo SS 89k
1978 Malibu  FORMER DURAMAX FORUM MODERATOR...........i HAVE YOUR iNTERNET pROVIDER ADDRESS...:tease   |