If you got the RS harness, it will take 2 1157 bulbs for the tail lights and a 1156 bulbs for the backup lights. If it is the non RS harness, it takes a 1157 for the outside tail light, a 1156 for the back up light and depending on if you want the inside light to be as bright as the stop/turn light use a 1156. If you want it to be as bright as the running light in the outside tail light us a 1155 bulb. I recently went through this a couple of weeks ago and got this sound advise from a couple of helpful members.
Bobby
Bobby
