So I bought an aftermarket third brake light for my 05 silverado 1500. It look really good on the truck but the thing sucks. Had it on for a day and it worked fine next day did work at all. I put my stock one back on and now that one doesn't work and my dash show that the bed light is on constantly when it's not and my interior lights will not turn on now. I don't know what the deal is. If anyone has any similar problems or suggestions that work be greatly appreciated!

 

Did you check for any blown fuses?