2010 Avalanche ABS Module not talking to ECM

[Pastorchico]

2010 Avalanche 5.3 Vortech
Help Please! Installed AFM DOD Delete kit which included a Predator P2 Tuner. Tuned both Stock and 87 Economy only changing Tire size and AFM.

Result is ABS, TC, Brake lights always on. Validated ABS is not talking to the ECM with a scanner.

I’ve read countless updates going back to 2013 identifying this issue with other Chevys but not the Avalanche and being resolved through the TC setting in the tune or tire size. I do not have a TC setting in the tune. I have Tire Size set at 32 measured according to the instruction.

P2 Settings
App Ver:84
IAP: 24
VID: 948

[mikel]

if you set it back to 27-28"for tire size is it happy again?
is the speedo correct when set for 32"

If yes to both, you are likely out of the accepted range for the abs module. Might be able to get a dealer update for the largest (tallest) tire option to reduce the % of change.