Help: Tuner on 14+

zach1990 · December 13, 2017

Hi all. I have a 2014 Silverado with the 5.3, 6 speed, and 3.42s. Just got my Diablo programmer and have spent most of the day playing with settings. I'm curious as to how others are setting up the trans settings. Put it to the Diablo tune and disabled TM and good grief did it shift hard. Currently have TM on and firmness set to 75% of tune.

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1SLOW1500 · December 22, 2017

I'm not a Diablo tuner I use Hptuners Pro. But it is insane the amount of settings,options, and just ways you can set it up. However it can cause issues in other things. I would look at the shift points vs. cut out and then make sure you shift before that.

My issue was fuel cut at 5800rpm and that throws the failsafe and cuts boost and then shifts with low power.

But I'm single turbo.

What type truck you have single cab with 2wd? I ask because there are other issues in the drive train.