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Thread: Lifted truck applies ABS/Traction Control

  1. #1
    Tuner in Training
    Join Date
    Jul 2010
    Posts
    35

    Lifted truck applies ABS/Traction Control

    I have 2014 Silverado 4x4 with a lift and 35 inch tires that came into the dealership for a surge.

    The dealership changed the ECM and the surge went away however the ABS/Traction control applies in a tight corner and the Stability Control Light flashes. The tire size was not corrected, 2014 Silverado pull cal 18June2020.hpt, and the cal shows 419.0 for the ECM and 406.00 for the TCM should these be the same.

    Putting stock wheels and tires on the truck the ABS applying goes away and the Stability Control Light does not turn on.

    Correcting the speedo for the 35in tires, ECM & TCM set to 358.06, 2014 Silverado 35in tire 18June2020.hpt, did not change anything with the 35 tires on the ABS/Traction Control applies and the Stability Control Light flashes.

    Doing a compare with the old computers calibration, 2014 Silverado computer old pull cal 2July2020.hpt, and the new computer with the tire size corrected there are no differences.

    I pulled the calibration from the old computer and did a full flash on the new computer. Now the ABS/Traction Control doesn't apply but the surge is back.

    Any thoughts on what can be causing this and what the difference could be between the calibrations.
    Thanks
    2014 Silverado 35in tire 18June2020.hpt
    2014 Silverado computer old pull cal 28June2020.hpt
    2014 Silverado pull cal 18June2020.hpt

  2. #2
    Tuner
    Join Date
    Nov 2018
    Location
    West Coast
    Posts
    196
    Sorry if this doesn’t help and that it’s late. The gen v stuff, the trans has two speed sensors,
    One that goes to dash and that’s the one that was corrected when you do the tire wizard etc.
    The second goes to the abs computer etc etc. up until recently the hptuner didn’t effect that. Trifecta had it sorted on their tuning software (bluebird or what ever it’s called).

    But hptuner says they have recently updated the softaware to fix this problem. I haven’t tried it yet as my truck is 5+ hours away. But I’ll be reflashing it in 3 weeks.