keepitrunning

Have an 04 gmc 1500 sierra slt, the left blinker quit working intermittently now it won't work at all unless the brake pedal is depressed and i use the signal manually. The right blinker has always worked just fine. Read this post and bought a flasher relay modual from ORileys auto parts this morning. The modual was supposed to replace part number 10383321. Put it in and now the right blinker won't work. Now what do i do? Paid $80 for the part and it is not returnable. Put the old module back in. Will take it out and clean contacts, but doubt that will help. What is my next step? Please help.