Originally Posted by
carotene
You should use the complete stock engine harness. If you don't have an HPtuner yet get one so you can set up your stock pcm yourself. I found out that is the cheapest way and the best too. I have done it myself for an off road buggy I built. You will need the throttle pedal and wiring too. You will have to make some wiring yourself but if you are handy it's not hard at all. I suggest you get the online manual for your 2012 cruze . I'am sorry but I cannot remember the name of the manual it doesn't cost much and it is well worth it. The name of said manual starts with an M that's all I can remember about it, someone else on here can help out with the rest.