help with 99-00 escalade clip

i have a question  im piecing together a  escalade front clip for my dually.my question is do the escalade head lights bolt up to the chevy core support or not?
 
 
thanks

They do as long as you have the hardware that goes with the Caddy headlights. You need the ABS plastic header panel pieces that normally come already mounted on the headlights.

ok and what about to install  a  01 gmc sierra bumper?  i just build custom brakets or was the best way to star..   thanks