Torque app is real popular. I would think it *should* but I haven't verified as I don't use it. But read
THIS, how to do it. Be careful ..old info probably has changed as apps improve. It should say on their website I would think. Hopefully someone who uses it will chime in.
There's OBDLink MX+
HERE which I know a lot of guys on other (non H3) forums use. I believe they have a matrix on their website which shows what they allow. If its a readable point by GM they probably do show it, but verify as I don't have that unit. The nice thing is it's bluetooth, super compact and cross-platform ...if that matters to you. A guy can observe readings while working on the engine, for example (no cable).
It's a 'readable' point (by a snap on scanner) anyway.