[sparkyballz]

I finished a 6 in superlift on my OBS GMC and with 33's my speedometer is off like 5-10 miles an hour, is there any way to fix it with out buying that speedometer calibrator from superlift?

 

[Silverado]

Well you could buy a Hpp3, or a nelson tune, or try and find a dealer that will do it for you. Some dealers are more modification friendly than others. :crazy:

 

[Alden]

hypertech worked good for me

 

[Andy]

Superlift makes a little box

 

[axisT6]

I finished a 6 in superlift on my OBS GMC and with 33's my speedometer is off like 5-10 miles an hour, is there any way to fix it with out buying that speedometer calibrator from superlift?

If your truck is 1995 and below, there is a tech article on www.fullsizechevy.com the tells you just how to recalibrate the speedo. If it is 1996 and later, go hypertech. :read: