It's possible to modify the rear gear ratio with inTune handheld programmer?

Hi guys, I'm with you for GM TCM support. Thanks to Keep this Forum alive!

http://diablosport.com/CMR/software/Gen ... .3.0.8.exe

Hi Challengeit, you can try
http://diablosport.com/CMR/software/Gen ... .3.0.8.exe
but i can't test it right now.

[quote="06MonteSS"]you need to find/locate the Air Fuel Ratio / Equivalence Ratio parameters and select them to log 'em...

Hi there, I have the same problem. Where can I find Air Fuel Ratio? I think that's not on my log file.

Maybe the TCM support could help me to set it somewhere between tow/haul mode and regular mode.

Thanks guys. I will try to log data and view the results.

My truck is 40 000 miles and I run it in 87 octanes.

I bought my inTune for economy.

With MPG Booster tune, my consommation increased by 0.5 MPG.
With 87 octane tune, my consommation increased by 1 MPG.

This is my Pick-up:
2007 Silverado 2500HD
Rear axle ratio is GT5 = 4.10
6 speeds, gas
With big commercial truck caps (7 feet high)
Always loaded ...

Why there is 2 speed limit?

"Speed Limit 1" and "Speed Limit 2"?

Tank you for your answer,
Sorry I was refer to MPG Booster. If I want to try an other setting what are you suggesting?
I forgot to mention that the eingine is a 6.0 L gas 6 speeds.

I think that I need a pin calibrate the touchscreen?

Hi There,

I bought an inTune for my 2007 New Body Silverado 2500HD with a big commercial truck caps (7 feet high).

The load in this pick-up is about 3000 or 3500 pound always.

My goal is to save gas but want to keep this pick-up for a long time...

Should I use GPMS setting or I am better to use ...