My bk lft brake lite n bk left blinker does not work... wat cud b the problm? on 2000 Chevrolet Express 1500

the left rear hazard, blinker, and brake lights do not work. should i change the bulbs? or should i try wd-40 into the hazard light switch?

Asked by for the 2000 Chevrolet Express 1500
1 answer
do the simple first, check the fuse.