Whats wrong?

You need to do some data longing on the LTFT's and get them dialed into your truck. Your final result should be 0 to -2 for maximum performance gains. If the LTFT's are reading 5, then you need to adjust your injector slope -5.

Steven

Your 06 should have full control over the transmission and torque management.

Tire size or gear size set correctly?

Steven

Awesome, thanks. I've got a friend who has an 08 Vmax and wants the diablo but is afraid to screw up his warranty.

Steven

Can GM tell if the pcm has been change after using diablo tuning or anyones tuning AFTER returning it back to stock?

I heard for 2008-up GM did some kind of counter that shows them how many times the PCM has been flashed?

Yes/No?
Steven

If the software is causing the problem, Is diablo offering to pay for at least the tow or reprogramming the PCM or both?!?!?

I'm not touching mine!, its working just find on the older software.
Steven

Get them to average 0 to -2 and you'll see a smoother stronger power band.

We've been hearing that for years now about Torque management...

06MonteSS wrote:right behind the TCM support...

x3.. . To funny
Steven

Yes, the lq9 responds well to tunes, so I'd assume you'd see similar gains. Your 06 Diablo controls TM too, so you'd "feel" more of the gains.

Steven

The dyno shows a 25hp increase on 91 tune, so thats 392... thats only 6 less and i believe the diablo tuned 6.0 will run with the 6.2. Also the 6.2 has a lower 1st gear, but the Vmax will have better gears in the rear end. So I think it would be VERY close.

Steven

Not a fan of Hypertech, I had one before (HP3) and although not bad, it wasn't great either. I know the max energy is good, but I've read plenty of guys who bought it and switched to another programmer.

Superchips gives you an 87 tune, 91 tune, towing tune, and now a mileage tune. It's certainly ...

Lew is Da man!

Still going strong!
Steven

Mine was 8r08 and it worked?