Check this out! help!!

[05duramonster]

read this thread and see if you can lend a hand.

Thanks

http://www.dieselplace.com/forum/showthread.php?t=283946

[GAMEOVER]

This is all trial and error, I programmed a 2007 Duramax LMM with 325/60/20's tires which = 35.35" tire height...I learned that the ECM didn't like to see anything over 35" so Ive been using a tire height of 315/60/20 which = 34.88" tire height and Revs are 578.18 per mile
The ABS & Brake lights went away and the speedo is off by 1.5 mph sometimes 2 mph on the freeway.....Hope this helps

[05duramonster]

i havent been that low in revs yet so i will try it tonight thanks

[05duramonster]

well 578.18 no go! how sensitive is this? is it gonna have to be like the exact number it wants to see or can it be off alittle?

[05duramonster]

alright just measured the tries on the truck and the are 33 7/8 so i went in and entered 600.99 which is a 33.56. still no work so i just jumped to 604. will let ya know soon but i still wanna know how sensitive it is to being the right number?

[05duramonster]

Well i have been talking to a few other people and trying different things. I have been from 605 to 620 to 640 and now back to stock tires size and still having problems. I also pulled the abs sensors and checked them and couldnt find anything wrong. There is some more updates on my dieselplace thread if you want some more info

[GAMEOVER]

Man, I don't know why it won't work for you...You've been all over the place with the Revs, maybe something else is keeping it from working right...........

[05duramonster]

thats what i thoughter but everything checks out unless the abs module has gone bad in 10k miles?? i doubt it

[GAMEOVER]

05duramonster...Did you figure it out?

[05duramonster]

nope i have been all the way bac to stock tire size now. it seems like if it is cole outside the light stays on longer before it goes off though? still lost!!