K 1500 Suburban 4WD V8-5.3L VIN Z Flex Fuel (2003)
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).