This article is just sharing real experience when use GM Tech 2. Hope this helps someone.
I decided to invest in some tools to diagnose my Opel. After a couple weeks of searching all over ebay, aliexpress and other online store, I finally found the cheapest one on uobdii.com, they were very fast to respond and answer all of my questions. I exchanged emails with Customer service for about 3 days before I finally decided to purchase a tech 2 clone here. I ordered it on Tuesday and I picked it up at Friday (I missed the fed ex guy and you have to sign for it). Yes, it only took 3 days delivery!
I paid $349 for it. The quality of this is amazing. I would never be able to tell it was a clone. I hooked it up to my car and was able to replaces Opel Corsa-C ECU.
So here it is....
Below is the procedure, I search and learn from forum members:
Great! I can see GM Tech 2 replace a new engine ECU for Opel Corsa C successfully!