are the daytime running lights important? on 2002 Saturn SL1

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
when first start up car in morning & its in drive the lights come on; but when shut off then started again there off. Changed both bulbs and the relay. What else could it be?
(2) Answers
drl day driving safety issue,night lights are very important
Could be the module for the DRL, make sure your parking brake is off