i have a 98 GMC Sonoma with a 4.6 (V6)and you can hear it grab second gear! but if you dont like the way it set up itself you can go back and customize each and every set up (tire size, gear ratio, rev, speedo, shift fermness and alot more!!) if i was a Kindergarden teacher i would give it a GOLD star!!!
I was very scared at first, the module is made of plastic and trying to secure it into the ECM was nerve crunching at the thought of snapping the plastic. After a hard start, the module adjusted the factory settings and damn, I was off. At an average I dropped off a second and a half on my 0-60, haven't tried the 1/4 Mile yet. I'm interested to see. Any Fuel Injected vehicles NEED this chip!