Anyone here a C4 guy?

[101lifts2]

Originally Posted by Avatard

Geez, I dunno...the standard D-shaped connector. Same one on my '99 Expedition...the standard ODB2....

1984-1993 Corvettes used the OBD1 12-pin D shaped connector. 1994 and 1995 used the OBD1 system as well, but was equipped with the OBD2 16 pin connector. These cars are still OBD1, not OBD2. I doubt if the Actron scanner will work on your car as I think the controller uses UART communication, not J1850 Class 2.

The 1999 Expedition is OBD2.