Thats because the 07 use two bulbs, while the 04 to 06s use three bulbs.robwclark said:They are a pain to install if you just try and install them because the lighting boards behind the 02-06 tail lights wont fit the 07-08 lights. You have to go in with the star-scan and change the setting to "combined rear lighting" as if you were putting a flatbed on with trailer tail lights. Then they work just fine with some good splicing!