Hand Held for use with 2001-2002 and 2004-2010 GM 8.1L Motorhome Key Features: Power, Fuel Economy and Performance Delivers power on demand by removing factory's power delay Internet updatable Flexible all-in-one programmer and scan tool Merging and passing Power on Demand Displays 16 critical Workhorse engine functions Works on GM 8.1L Motorhome Will Not work w/2003 model years 50 State Compliant CARB E.O. D-161-98