Chevrolet Tahoe Forum : “radio will not work even with the key on and the fuse is fine. also if battery i...”

Dear chuckll--  Something is obviously draining your battery.  Electrical problems are hard to diagnose without being able to use testing tools.  Since minor electrical problems can become major ones with the slightest mistake, I suggest you let a professional mechanic have a look at it.   Good luck from Bovan.