Proud New owner of a 2007 GMC Sierra LBZ!
 

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? :c:

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.



Attachment 24044

Attachment 24045

Theres my girl! :c:

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:tu:

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 :choochoo:

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 :scare2:

gettin awful warm in here..:humm:

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