Airbagit Tow Kit 2001-2010 GM HD Heavy Duty 4 Link - Manual (Page 3)

7. Install the new 4 link mounts. The 4 link mounts install into the factory leaf spring
hanger’s mounting holes
8. Install the upper and lower halves of the axle 4 link mounts. The lower half will fit
snugly against the axle and the upper half will locate in the centering pin of the leaf
spring pad. Install 5/8”-11 x 7” bolts and finger tighten for now
9. Align the 3/8” diameter holes on the bag mount with the with the original bump
stop mounting holes on the frame. Also align the large oval hole on the side of the
frame with the oval hole in the bracket. Make sure that the bracket sits directly
over the centerline of the axle and mark and drill the remaining holes and attach the
upper bag mount. The pan hard mount on the driver’s side of the truck utilizes
many of the same mounting holes so be sure to install that before all of the
hardware is tightened.