I received my Tech 2 from Obd2tool.com two months ago. It was a longer than expected shipping time but am quite happy with it so far. I have not yet used it and my first task will be to perform a CKP relearn. Ill let yo u know how it goes in the following parts.
Q: Can GM Tech2 Scanner support key coding and electronic control unit programming for all OPEL and Isuzu?
A: GM tech2 can’t support key programming; as for electronic control unit programming, you need to additionally buy a GM TECH2 and a TIS2000, but TIS2000 only support GM and Opel, not support Isuzu.
Q: Can GM Tech2 send commands to the various modules and is it able to do diagnostics on a climate control programmer? To what year is the scanner effective? I own a 1997 Cadillac DeVille and a 2001 Chevrolet Venture.
A: Yes, you can use GM TECH2 to diagnose climate control programmer, when it has communication GM Tech 2 can send commands to the modules.
Q: GM TECH 2 contains Saturn software?
A: yes, Saturn software is included in the GM software English and support for on-board diagnostics on all GM systems 1992 thru 2013.
You can pick up a tech ii scanner clone for about $350 from China. I have one and I use it all the time. It has proven to be rock solid reliable and does everything a real one does. Mine came with a USB key that will authorize changes to your car. If your VIN is not in the key you get then for a small fee you can get authorization just like any shop doing the work for you has to do.