Hello RAMMCCALLA--  You will learn how to change the tailights and all the other lights on your 1990 Chevrolet Lumina by going to the following site-- http://autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/0e/d9/af/0900823d800ed9af.jsp.   Good luck from Bovan.