Tuff Country 16085 - GM 2011 Silverado 2500HD 6 box kit - Manual (Page 13)

48. Using the new bracket as a guide, scribe a mark on the
lower control arm. Remove the newly installed lower
shock/bump stop bracket and set aside. Drill each marked
hole out to 15/32” holes. Special note: Drilling a pilot hole
is highly recommended.
49. Locate (2) 7/16” x 1 3/4” bolts, (4) 3/8” USS flat washers
and (2) 7/16” unitorque nuts from hardware bag 10865NB1.
Place the lower shock/bump stop bracket back onto the
lower control arm and secure using the new 7/16” x 1 3/4”
bolts and hardware in the previously drilled holes. Now install
the stock hardware into the lower OE shock location. Make
sure to use loctite and torque to ?? ft. lbs. Move back to the
newly installed 7/16” hardware and add some loctite torque
to 80 ft lbs. Special note: Make sure that the OE bolt is
installed from the front of the control arm to the rear. Set
lower control arm a side.
50. Repeat procedure on the passenger side lower control
arm and lower shock/bump stop bracket.
51. Locate the driver side upper bump stop relocation brack-
et. Working on the driver side, install the new bracket over
the OE front bump stop bracket and using a pair of vise grips
clamp the bracket in place. Using the bracket as a guide,
carefully scribe a mark on the OE bracket in all (5) hole loca-
tions. Remove the new bracket and set aside. Using a 5/16”
drill bit, carefully drill out all (5) locations. Repeat procedure
on the passenger side.