I hav4e a 2009 silverado LT and has DL8 mirrors and I would like to replace them with the DL3 mirrors with the puddle lamp and fold option. I've got the new mirrors and can already see I need the drivers switch/control panel. Do I need to replace the passenger one also? I'm also guessing I'll need to have the computer reflashed after replacing these 4 things so they will work. HELP captrcpjr@gmail.com