There is a Torque option to use "Faster communication" with the OBD II adapter, I need to try that (Torque says it may not work with some devices). When data is changing rapidly (e.g., go pedal is mashed) the datalogger function seems to have trouble keeping up (RPM lags, for example). It's a little jumpy on my application - while DIC says steady 42 PSI, for example, Torque will show it jumping between, say, 41-43. This is not part of the extended PID set, you have to create it from scratch. Unfortunately this PID is not available on the Track Recorder (need to message the app author on that one), but it can be installed and seen on the live data page. This also is part of the GM extended PID set (listed as GM Method 1). I have no way to confirm if this provides a accurate number. GM Trans temp: set up custom PID 221940, unit C, max/min 200/0, equation A-40. The trans temp parameter as not receiving any data.
I think this is part of the GM extended PID set that you can access thru the Torque main menu. These codes are primarily for use with Torque Pro which runs on Android phones. It's not exactly correct but it's usually within 5-10 degrees on my DIC. GM Oil Temp: set up custom PID 221154, unit C, max/min 215/-40, equation A-40.