why does the seatbelts hold you tight to the seat when driving on 1999 Chevrolet Silverado 1500

most of the time i cant even reach the radio

Asked by for the 1999 Chevrolet Silverado 1500
It may be a defect in the ratcheting mechanism in the seat belt, compare it to the passenger side bring it to a auto repair shop and get it checked/replaced.
you may have some debri in the racket assm. like coins or kids stuff if you have kids