I just went through this ordeal. I found the bulb holder was broken so the contact was only intermittent. I found a complete upper tail light assembly on eBay with bulb holders bulbs the works for ~$45. The original one was damaged due to arcing and a faulty connection. The replacement solved the problem with help from a YouTube video for install tips. I saved the original one for possible contact repair down the road. 01-07 will interchange but the later years have slightly different lenses. Hope this helps.