Enthusiast
I ordered it from 4wheelparts in Southern CA. I guess it's been out for a while and they just got around to testing it on the Duramax/Allison. It goes inline with the vehicle speed sensor wire from the main PCM. It has two trim pots on it for 2 different tires sizes. You just turn the trim pots the correct number of times to adjust to your tire/gear size.
allamerican1
2002 GMC DMAX 4X4, slt Ext cab, Short Bed, Summit White w/tan interior<br />Line X Bedliner<br />Westin SS Nerf Bars<br />Eagle Alloys w/Brigstone Duelers 285/75/16<br />4\" Diesel Dynamics Exhaust<br />Autometer Boost & Pyrometer<br />Amsoil Air Filter <br />Husky Liners and Mudflaps<br />GMC Underseat Storage<br />Kennedy head light Harness<br />Uniden CB<br />The Juice<br />Superlift Truespeed Speedo Recalibrator
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