To convert a 04 Sierra to a denali front end, what has to be done?

Is it just the grill, side marker lights, and the lower valance? Or do I have to change the hood and fenders as well. I know the headlights are interchangable, so I figure everything above the headlights should be the same, I would just be swapping out whats below.

I will take a look in the part numbers thread, if anyone knows the part # for the grill, lights, and valance offhand let me know.

thanks

 

valance-12479754
grille-15764319
fogs-16516336 165166335
prob have to have the impact bar also 15060470
dont have to change the fenders or hood

 

hey is the bumper cover one of them part numbers? yes the impact bar and all the mounting brackets for that bumper for the denali.

 

frame horns wont line up on an 03 and up.