Suburban 3/4 Ton 4WD V8-6.0L VIN U (2004)
5. Locate and drill out all necessary factory welds in the hinge access panel. (Fig. 4-46).
6. Pry access door out to gain access to the back side of the hinge (Fig. 4-47).
7. Locate and drill the center of the hinge welds using a 13 mm (1/2 in) drill bit or the equivalent (Fig. 4-48).