Do you still have to disconnect the aftermarket wiring harness to tune like with the T1000 or does the T2 have the ability to tune with it being connected?

Are the canned tunes on the T2 the same as the ones on the T1000? I have a 2003 GMC Sierra 1500 4.8. Just wanna know if the T2 has updated canned tunes or are they the same tunes on the T1000.

So yesterday I got the tune to work and everything went perfectly fine. Disconnecting the aftermarket harness did the trick. I feel like an idiot.

I never undid any harness just disconnected all the wires and cords that was connected to the touchscreen head unit. And then I pulled the head unit out. And then tried the trinity but would never back up the original pcm.

I unplugged the amp from the battery and I pulled the head unit stereo out of the dash and unplugged everything connecting to it. I also pulled the radio fuse.

I'm receiving error codes (-11) , (-11), and then (4).

The error codes are -11, -11, and then 4.

When my truck isn't running it's running 12-13v. That should be good right?

Let's say I do this and it still doesn't work then what else could it be?

I'll try it but I do not own a battery charger.

I unhooked everything completely. And it doesn't say on the trinity low battery. I should have plenty of battery.

I just got the diablosport trinity T1000 today. My vehicle is a 2003 GMC Sierra 1500 SLE 4.8L. I downloaded all the drivers and software that is current. I also updated my trinity as well. Well in my truck I have led headlights, aftermarket touchscreen radio, subs, aftermarket door speakers, led ...