Thanks LoneWolf. It's programmable so it has the xgauge software. I added transmission temp and knock retard to it. I used it lots of times for the CEL clearing.
Stucky, here is a list from the HPP3 site:
Shift Firmness 25%, 50%, 75%, & 100%
Shift Point -500 to +500 RPM
Speedometer\Odometer Correction For Gears 2.73, 3.08, 3.23, 3.42, 3.73, 4.10 & 4.56
Speedometer\Odometer Correction For Tire Sizes 24-54 inches 1/4 inch increments
Top Speed Limiter 81, 87, 93, 99, 106, 112, 118, 124, 130, 149, 168, 186, 255 MPH
Rev Limit 5200 to 6200 RPM in 100 RPM increments
Return Back To Stock
DTCs Read and Clear
It also changes fuel octane. That part # is for 2002 chevy/gm trucks but I think all the s10 computers were the same? You can only have 1 vehicle programmed with it at a time. You must remove the programming on the 1st one to program another.
For the scanguage its a little more complicated. It can read check engine codes and clear them. It also can read outputs from the veh's computer such as tranny temp, live horsepower output and torque, knock retard and many other settings. Here's a link to them:http://www.scangauge.com/products/scangaugeii/