Okay I have a VMS tune ECM/TCM 3.5L 93 octane in my g6 and was wanting to take it out and drop the factory ECM and TCM back in. When I installed the tuner I have now I had to use the Dashhawk to learn the new tune. Would I have to do the same going back to the original ECM/TCM or could I just pull my modified tune and put the factory one back in without doing anything else?
Thanks for any help!
Thanks for any help!
Comment