Reading through all of the the posts I can find about Tech 2 (many people from this forum have suggested buying a Tech 2 to help find potential cause(s) of random Tahoe misfires, dreaded stabilitrak/intermittent CE light etc - won't bore you with issues), but need clarification if anything else needed with Tech 2 device. Reason being, upon my suggestion, my husband spoke with his mechanic friend (who ran a few preliminary tests to track down the cause of issues) to see if we could borrow a Tech 2 and his friend said that it was too costly so he didn't have one. Like in the $1000s??? Is there other equipment or computer programs etc that mechanics usually have alongside the Tech 2 unit that an average Tahoe owner wouldn't? To be clear, this guy is very experienced and has worked on many GM vehicles, so not sure what's up. From what I've read here, should be less than $300. Am I missing something here? I will buy one if that's all it costs, then read all your posts or YouTube videos to learn how to use it myself!