I did my conversion for around $1200 and used ebay like crazy. After it's all said and done it was worth every penny. The only pieces I had to get from the dealer were the Impact Bar and the Fog Lights. Turned out great when I got it all put on. I have also added the filler piece between the tow hooks and take those stupid bed rails off since these pictures were taken.

 

The Sierra C3 or the now Sierra Denali has color matched tube steps or a running board kind of step after the front tire and before the back tire to smooth out the lines. This makes the bumper cover look a good deal better. I think it is a awesome looking set up in the first place. But the high difference between the bumper and the rest of the truck does suck.

 

I did this swap as well and you can see the step by step here.

http://james.jaguar.net/00z71sierra/GMC

I did a lot of research and found a complete used bumper on ebay (not just the cover) for $200. That was a lot of the cost right there. With everything I spent roughly $700-750 including the projectors and paint. Again, the parts hunt probably lasted close to year before I finally rounded everything up but it was well worth it. Easiest mod by far; everything fit perfect with no modifications. I highly recommend this swap if you can afford it!! Don't pay dealer prices though.

Now, the console swap I was looking to do as well however the price of that has kept me away from doing that. I'll throw the money at more performance parts

 

I have an escalade console, only big difference is the zebrano wood pieces, there are two parts, those could be replaced with the denali wood grain, would be much less than new, have escalade seats also.

 

here is a couple a pics of mine