1990 chevy lumina speedometer

is there a speedometer cable in my lumina?

if so where is it ?

You most likely have a sending unit on your transmition that electronically sends the information to a circuit board in your dash that gives the speed of travel.
My wifes 90 Olds acted up some years back and we had to replace the “board”. (dash removal and replace)
That is if your speedometer has quit???