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 ????
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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 ????
H0105