I get no amber indicator lamps on my shifter buttons. won't shift to 4wd. on 2004 Chevrolet Silverado 1500

It seems to be locked into 2wd and can't shift when buttons are pushed.

Asked by for the 2004 Chevrolet Silverado 1500
maybe the actuator or fuse is not working.
1 more answer
check your fuse, relay, and connectors at shift button or transfer case and actuator . No lights indicate a loss of power at the shift button terminal...