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I have a lot of questions for anyone that has done the on3preformance kit. What modifications did you have to do/ move things out of the way? How much power did you make in stock fueling? How long did it take u to install? And any tips before buying/ installing? -
Hey Everyone! I just got a 2017 Sierra SLT over the weekend with a 6.2l engine and 8-Speed Tranny. 85,000 Miles The previous owner had done the following that I can tell from Carfax and looking around: -Aftermarket Headers -MBRP Full Exhaust system -Catch can setup -Heads taken off and gaskets replaced (Per carfax) -Differential Fluid changed -Differential Cover changed I am trying to read up on everything about it and I had some questions that may be obvious or simple but I am having a hard time finding the answers to. 1.Im not entirely sure if the truck has a tune or not.Is there a good way to tell? 2.Would a custom tune disable AFM? 3.Do I empty the Catch can often? 4.Should I do the TSB 8 Speed fluid change at its current miles? Or is it too late? 5.Any advice/ info to a new 6.2l anyone has? Im wanting to know as much as I can. I am looking for this truck to be a 15 year truck. So maintenance and must do's are very important to me. Thanks for any help!