How do you set the speed on this truck,I have reset the ECM/TCM no help,he has 285/75/16 and is 5 mph off ? He has been told we need to get hypertech and that EFI can not chang it ????
2009 chev 2500 hd speedo 6L90E WITH 6.0 need hypertech
How do you set the speed on this truck,I have reset the ECM/TCM no help,he has 285/75/16 and is 5 mph off ? He has been told we need to get hypertech and that EFI can not chang it ????
Last edited by JST; July 28th, 2012 at 04:50 AM.
2002 GMC 2500HD 4x4 SCLB STOCK MOTOR WITH TOMAN TUNING,FASS 150, M/A TRANS,11.90 ON A GOOD DAY IT'S MY WORK TRUCK,19 TO 21 MPG WITH ME DRIVING,THE TRUCK (OLD RED )HAS 909,000 MILE AND LOVING IT,285/75/16
H0105
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