4 wheel drive on 2000 Chevrolet Silverado 2500

when i go to put my truck in 4 wheel drive the 4 low button and 4 high button just blink and will not go in. also my towing button on the shifter dosen't work ether.

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1 answer
MOST LIKELY CAUSE IS THE TRANSFER CASE ENGAGEMENT SOLENOID IS STUCK OR IN-OP. YOU WILL NEED TO TAKE IT TO A REPAIR FACILITY THAT HAS A TECH II GM SCAN TOOL TO GET AN ACCURATE DIAGNOSTIC.