Mike,

I spent some time this weekend to reload the stock TCM tune to the truck without modifying any settings. I also reloaded the custom tune you sent to my ECM. I shouldn't have said that your tune shifts worse because that is not true, but it is feels much the same as the canned tunes. Still ...

I can try it again, I installed it with the firm shift TCM with no modifications. Should I try it with the stock TCM tune?

Hi Mike. No go on this tune. I got it installed ok, but it may even be worse than the canned tune. I think I spun the tires slightly during the 2-3 shift. Thanks in advance for your help.

Thanks Mike, sure appreciate it! See attached. This is the 87 Octane tune with a few simple modifications. TCM is the firm shift tune with no modifications.

So to provide some background, I have owned my i1000 for a while now and it is fully updated. I had it paired to my previous 2008 Silverado with a 4l80e. Worked great, loved the way it woke the truck up. It was tuned with the 87 Octane tune with firm shifts. I recently bought my father's 2012 ...