I have the free version for quite a while. Maybe I'll uninstall it and get the $4.95 version. I have added the GM PID's on manage PIDs screen. But I can go to settings from home screen, select manage PID's , I can see the two KR PID's, if I select either then hit edit and scroll to end of edit w/o changing anything, then hit 'test' I get a no response error message. Also when connected to PCM, When I add a gauge in scan mode , then scroll to KR selections (there are two) neither is green. If I could actually find the correct PID offset address used in the Envoy then I could manually add it to Torque. . Unfortunatly PID lists cost $$$. so there is not much free PID detail beyond the standard OBD2 SAE PIDs info floating around.