What reverse light bulb is an 08+?

[06powerstroke]

I ordered some reverse lights from Retro Solutions and they are clearly the wrong bulb. I used Sylvania's online look up and it said it was a 3156 bulb. However its more like a 921 or 922 bulb. I even went to Pep Boys and they show a 3156 bulb. Anyone know for sure? Thanks

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[G Racing]

It should be the 921. The 3156 is for the earlier trucks

 

[PatriotHauling]

921. Make sure to get a high wattage one for the best performance. I am running Sylvania SilverStar 17w 921s.

http://www.amazon.com/Sylvania-921-...V5KM/ref=sr_1_1?ie=UTF8&qid=1331182008&sr=8-1

 

[06powerstroke]

Thanks guys. I wonder why every online guide shows a 3156... Caused me quite a headache! Now I have to contact Retro about a swap...

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[PatriotHauling]

Hmm.. I'm not using the OEM harness though..

 

[06powerstroke]

Hmm.. I'm not using the OEM harness though..

It's definitely a 921 bulb. I just wanted to be sure before I ordered lights again. Anyone want to buy some 3156 Cree LED reverse lights?LOL