If I read what your saying right, the bumpers will fit with a slight modification. On the 99-02 silverado the HD trucks have a 2in taller frame which made the grill larger and the front bumper have that dip in the middle. You can either do a 1.5in body lift or cut and re weld the bumper mount 1.5in down. Or go to ranchhand.com they make one full replacemnt for the 1500 series