Good morning all,
I just did a stock read on a 2012 GMC Canyon. I'm just getting started with HP Tuners and was going to do the tire size change. Figured I would start slow and work my way up. My problem is that the read shows the wrong rear end ratio. It shows 3.73:1 when the truck has a 3.42:1 ratio. I want to change the tire size to 29" as that is what is on the truck currently. Do I need to change the gear ratio also or leave it as is? I've attached the tune file.
On a second note, I get a P0606 error from reading the ecm.
Thank you.