I have a 2000 chevy tahoe 4x4 that has locked 4wheel drive does anyone know why this happens or how to go about fixing it.

I have a 2000 chevy tahoe 4x4 that has locked 4wheel drive does anyone know why this happens or how to go about fixing it.

what is the problem? you placed vehicle in 4 wheel drive hi/lo and it will not come out...?

If this is the problem check fuses and wires at the transfercase...connector at transfercase...if all this is good get dtc for drivetrain and report back