I have an android tablet with torque pro (with the GM PIDS installed) and a BAFX OBD2 Bluetooth adapter. It reads everything properly (speed, rpm, coolant temp, etc) but KR stays at 0 no matter how hard I get on it. I have a hard time believing this car has absolutely zero knock, even at WOT through the full rpm range. I also lugged the car around in OD with the converter locked at about 45 and even up a slight grade, no KR on the scanner. Is that possible? The car in question is the 2004 Monte Carlo SS Dale jr edition. (L67 car) and running 93 octane. The only known modification is a 160 degree thermostat. No idea what plugs are in it. I haven't tried this scanner in the GTP yet, but I will as soon as the GTP is fixed.