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Best tune for GMC Sierra
Posted: Sat May 04, 2019 11:08 am
by Earthquake1
I just got my trinity T2 and hooked it up and I was wondering what the best tune is for my 5.3????
I have K&N intake and cat back exhaust installed as well
Re: Best tune for GMC Sierra
Posted: Sat May 04, 2019 2:33 pm
by 06MonteSS
if you use 87/89 octane gas, then select/install the 87 octane tune...
if you use 91/93 octane gas, then select/install the Diablo Tune...
if you have a 2007 or newer sierra, then select the Firm Shift tune for the tranny tune....
Re: Best tune for GMC Sierra
Posted: Tue May 07, 2019 12:09 pm
by Earthquake1
I have a 2016 and I’m using the Diablo tune with the firm shift. It’s great but I keep getting warning messages for “IAT”. What is this???
Re: Best tune for GMC Sierra
Posted: Tue May 07, 2019 12:13 pm
by 06MonteSS
IAT is Intake Air Temp... . not a tune issue... that's an issue/problem with your truck... use the tool to scan for trouble codes.. have any trouble codes? could be a problem with your MAF sensor...