Yep, sold my 2007 5.9 Cummins and bought a 2007 GMC sierra 2500 LBZ, so far it has an edge juiced CTS and i have a question, when i lay into the truck on level 5 i hit about 90 mph and the truck start to defuel, i know its the programmer doing it, anyone with the programmer able to tell me how to go into the settings and fix this?

 

I don't know about the defueling, but you better be careful laying into the truck on level 5, the Allison isn't going to like that. I would invest in a Transgo Jr. pretty quick if I was you.

Pics?

 

Judging from how hard it shifts it already has a shift kit and some tranny work. and i have TRIED to make it slip, its not happening.







Theres my girl!

 

nice looking truck

hard shifts are not the staple of a built trans. i can tune my transmission to shift softer then stock if i wanted. also you may not "feel" a slipping transmission.

then again you may be right and it may have had some upgrades done to it. if you are that's awsome

 

yea i understand but what i ment by it shifting hard is that it shifts harder and faster than what a stock one does, my buddy rode in it and he has a 06 with efilive and a stock tranny and he noticed it right off the bat. Any other way i could try to confirm?

 

I don't know but I imagine some other guys on here might. If you really want to fix that defueling, you ought to look into EFI Live

 

I got it fixed, here it was my EGT's, when I got on it hard and when they hit about 1400 it began to defuel, I set the backdown settings to 1600 and havent had a problem since. And efi live will come after an airdog, dual CP3's, Twins and Larger injectors. And I need to find out what is done with the tranny so i don't waste money on a suncoast tranny kit if i don't need one.

 

Sounds like a plan. Just be careful and don't hold it up there about 1400 for too long

 

gettin awful warm in here..

nice lookin truck though man, but yea dont be goin down the interstate with 1400 egts for a trip across country! hahaha

 

im selling a trans go jr for the allison 1000 6 speed. let me know new in box seal packages. $100.00 shipped