95 Astro AWD - Bad sensor in transfer case?

[cadilad]

While driving, the digital speedometer displayed random numbers, then staying at "0",Then the ABS light came on. When I came to a stop, the transmission would not shift out of first gear. I made it home by driving with the gear selector in the "2" position and driving very slowly. Would this be caused by the sensor in the transfer case failing?

Do you have any better ideas?

[GM-Tech]

Definitely sounds like a loss of speed signal. Could be the sensor or wiring or any number of connections, etc., etc.