I have 07 chevy 1500 with 5.3l. I changed rear end gear from 3.23 to 3.73. Now I have abs light that will not go away. I have an hypertech programer I stalled and uninstalled several times. Find nothin wrong with brakes or sensors. Gone over truck with fine tooth comb. What am I'm missing or suggestion to remove abs light.
Mike

 

*This is a common issue on 2003 and newer GM trucks after mounting larger tires and/or a low rear axle ratio. GM uses several different ABS computers for which some can't handle these changes. The Programmer only calibrates the speedometer; we do nothing with the ABS computer. Once the speedometer is corrected using the Programmer the ABS computer sees the speedometer reading. This causes the front and rear sensors to read differently. This happens many times when the wrong tire size is entered. Most so called 35 inch tires do not measure out to be 35 inches. Be sure to measure the tire diameter from the ground to the top of the tire while mounted on the vehicle. Most 35 inch tires measure closer to 34.00 to 34.25 inches. Once you measure and reprogram using the measured diameter test drive to see if the lights go off. If they remain on then reconnect and program again and this time go .25 inches (1/4 inch) lower than the last number entered. For example, if you entered 34.25 (measured), then enter 34.00 on the 2nd attempt. You can go down in ¼ inch increments until you get the speedometer reading within 10% of the ABS computer sensor readings. Most can go down no more than ¾ of an inch from the measured diameter to get the ABS/Brake light to go off. The speedometer will only be 1 or 2 mph off at this setting. Thanks and good luck.

 

After several hours and going a quarter inch at a time no luck. And now I have a p0045 code which says turbo is open circuit, I don't have a turbo. Anyone have any idea how to fix this problem??
Mike