Ok so i have an 88 firebird and i know that my headlight problem is the control module on the firewall............but, I had read somewhere that from 87-89 they were the same. So i bought one off and 89 from a boardmember here and its definately a the newer style and does not work. Alsomy gf 86 doesnt work........... So does anybody know for sure what years work with what? Or if anyone has one off an 88 that they will sell for $20 shipped it would be a big help. THANK YOU!