I have a 04 Tahoe and the headlights and grill are crap. Unfortunately I'm strapped on cash and can't afford new parts atm. But I do have a 03 Yukon XL that has headlights and grill that are in almost perfect condition. I read a few posts where people changed the Yukon grill and headlights to a Tahoe grill and headlights. But I tried to to the same but backwards. But I can't for the life of me get the headlights to fit or even line up to put the pins in. What all needs to be changed??