Hi:
I have a Blazer K-1500, 4x4, 350CI TBI. It has a funny problem: when speedometer indicates 50MPH, I=B4m going 60MPH, when indicates 75MPH is going at 90MPH.
I do=B4n=B4t know if it is possible to change the information in computer so I can have dependable readings in speedometer and odometer, as well as stop having problems with police.
Thanjks Oscar