I checked out Sylvania website to see what the bulb is for the backup light. On Sylvania's site it calls out for a 7506 bulb when I look up that bulb I find a ton of places that say 1156 works for a 7506 bulb. I have a few 1156 bulbs so I can replace it with ease if that is true but when I pull out the stock bulb it says it's a 1057 and I cannot find anywhere telling me an 1156 bulb can be used for a 1057. Anyone know anything about this?