This evening driving home, the yellow ABS light and red brakelight came on. This is the third time it has done this, it started happening ever since i installed the PPE programmer. I tried checking it wit with the diagnostic check feature with the PPE, but it says no codes found...And both lights onlyy come on maybe after 5015 minutes into my drive, sometime it just doesn't come on at all?? any advise and help is greatly appreciated..

sorry i meant 5-15 minutes.. not 5010..

Moved to Drivetrain.

when you put on your ppe, you must have recalibrated the tire size. If the increase in size was 20% or greater, it will throw that code after a few miles of driving. Same thing happened on mine.

Yeah.. I found some answers, one source told me regardless of what programmer you have it throws that code, efi,ppe,hypertech etc...So he told me that the tuner must be caliberated to 35.00" tires with my PPE, no greater or it throws the code. So I also called Dan at PPE, he said the same 35" or go to the dealership and have them flash the computer for the bigger tire size...So I called dealership, talk to so-called service tech, and he said that yes it could be done but toa certain extent, I told I have 37's and he was all weird about it...so I dont know, I think I'm just gonna programmer my tuner to
35's and deal with the fact of the speedo being off slightly, no big deal..

good luck getting the dealer to flash the ecm. i've had more than one dealer tell me no for my 285's claiming that GM will not allow tire size change flashes on the 2500HD's.