hello i bought my 97 blazer a few days ago it ran perfectly but on the way home the check engine light came on. when i hooked it up to the actron obd2 it came back link error, the next day i tried a move expensive obd2 and the same thing came back. both plugs are clean and all the pins seem fine. all my fuses are fine also. How do i fix the link error so i can pull my codes??