Downloaded DashCommand for iOS and have a WIFI ELM OBDII adapter. Bought the "Extended PID pack for 2002 GM vehicles". App connects and shows speed, hp, torque, MAF, etc, etc. But I can't get it to verify the "extended" PIDs for balance rates, fuel rail pressure, etc. which is I what I got it for. Anybody have any experience with this app or this problem? It might be important to mention that the truck walmartone had an Edge Juice w/ Attitude installed before I bought it. Could the Edge be intercepting the signals for certain things like the balance rates, etc and not sending them to the OBDII?