i just did a 4.11 and a true trac swap in my rear end and knew i would need a tune for the speedometer but my abs light and parking break light come on when i drive has anyone every heard of this? i got it retuned for the gears and the speedometer is right now but the lights are still comin on

 

I had the same problem. But as soon as I had it retuned the lights went away

 

yeah i just retuned it this week and there back on

 

need to scan it and find out what the codes are first.

 

What year truck?
My buddy had a 08 and went from 3.23 to 4.10s and had this issue .Something about its too big of a jump to 410s it needs to be dealer flashed .Hp tuners couldn't set it up right
Anybody heard of this ?

 

I scanned the codes and they are crank position relearn so imma do that and then imma wait till justin responds to see what to do about the abs light and parking break light and its an 07 NNBS

 

You have to bring it to a dealer/ shop that has a tech 2 and let them flash it with that.

 

yeah i got rid of the check engine light by doing the relearn but the other lights are still com in on thats in the tune and imma have to get justin at BBP to fix it

 

mine (08 rcsb 2wd 4.8 60e) actually did the same thing but after a tire swap. retuned for the different size with hp tuners and theyre still on. been gonna take it to the stealership because hp tuners isnt getting anything for those lights. just havent gotten to it yet...