Chevrolet Cavalier Vent Replace/Remove

I Had Posted Earlier About Not Being Able To Turn The Vent Setting Knob To Defrost, It Is Stuck On Top(dash) Vent Setting. I Can Now Kind...

I Just Bought This Car. When I Turn The Ac Or Heat On, The Smell Of Garbage, Or Dead Animal Rushes Through The Car. I Got An Oil Change/...