| Yes, i just went thru this problem , i have 37's with 4.56, call Dan at ppe, 714-985-4825,ppediesel.com, i bought thier tuner and typed in my tire size and gear ratio, and it fixed it.Look on the powertrain threads, abs light and you can read about my problem!!
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2008 gmc crew cab slt 2500, 8" fabtech lift, 37-13.50/22, amp research steps,billet grill,tinted windows,4.56 gears, PPEstandard tuner, MBRP filter back exhaust kit, edge insight with egt probe and dash pod |