I posted this in another thread but didn't get any feedback. Im a little iffy on what tuner to look into for my 2008 hhr ss. It's a manual with around 125k on it. I was looking at the trifecta, but do i need to purchase the cable and the tune?

 

Trifecta is what I have...You can put a deposit on the cable and return it for a refund...thats what I did...