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You have basically two choices for programming. From Underdog Racing (URD) you can pickup a MAF calibration unit which will need to be programmed for your truck. And from Unichip, you can pickup a Unichip Performance chip and they will program it acording to what you tell them you have on your truck. I had the Unichip on my truck until it quit working correctly.

Hey T.J., I bought a second stock grill off ebay for $35 because you have to chop some pieces out of it to get the billet grill on. I used a die grinder with a roto-saw bit in it to do the cutting but a sawzall should work as well. after I had it chopped, I stopped by the detail shop at my dealer and had them repaint it before I installed the billet part. Watch re-installing it in the truck. You can tighten it too much and deform the shell and it will show. And Thanks!

The aftermarket grill I installed was a Mr. Grill, Upper and Lower Billet Grill