Speedometer , tach and odometer quit (not digital) 95 GMC Sierra 4.3

Speedo cable may be loose at the gearbox or may have snapped inside, sometimes you cant see but inside the cable tears apart. only other option is the instrument panel if the cable has come loose from there then this will also cause the fault. Esy to check just unscrew the instrument panel and see if the cable is sat correctly.

If you need more specific advice please get back to me.

Regards

Dan