Today I tried ordering the parts to swap to the denali front. I currently have an 03 sierra. They told me my headlights would not work, and that the mounting cup was different. Is this correct? Also will my fog lights work now or do I have to buy new fog lights. The body shop that has my truck quoted me 2500 to fix my truck back to normal and if i wanted the denali it would be 1800 more. Someone please help me. Im already gettin a new grill and bumper and one blinker. I thoguht this was a pretty straight forward change out.