Tuff Country 14961 - GM 2006 Silverado K1500 (w/air shocks) 4 STRONG kit - Manual (Page 11)

Rear-end installation:
90. To begin installation, block the front tires of the vehicle
so that the vehicle is stable and can’t roll forward. Safely lift
the rear of the vehicle and support the frame with a pair of
jack stands. Place a jack stand on both the driver and
passenger side. Next, remove the wheels and tires from
both sides.
91. Working on the driver side, remove the stock lower
shock mounting bolt and set aside for later re-isntallation.
Speical note: We are adding a shock relocation brackt
so the upper hardware does not need to be removed.
Let the stock shock hang. Repeat procedure on the
passenger side.
92. Locate (1) BLR01, (1) 5/16” x 1” bolt (2) 1/4” USS flat
washers and (1) 5/16” unitorque nuts from hardware bag
14957PL. Working on the driver side, remove the
emergency brake line bracket from the stock frame rail.
Using the stock bolt, secure the BLR01 to the stock
location. Make sure to use thread locker or lock tite and
torque the stock bolt to 12 ft lbs. Now, install the stock
emergency brake cable bracket to the newly installed
BLR01 and secure using the new 5/16” x 1 1/2” bolt and
hardware. Make sure to use thread locker or lock tite and
torque to 18 ft lbs.
Photo # 90
93. Place a pair of hydraulic floor jacks under the rear
differential and carefully raise up on both hydraulic floor
jacks at the same time until they come into contact with the
rear differential.
94. Working on the driver side, remove the stock u-bolts
from the stock location and discard the stock u-bolts and
hardware. Set the stock upper and lower u-bolt plates a
side for later re-installation. Repeat procedure on
passenger side.
95. Carefully lower down both hydraulic floor jacks at the
same time approximately 4”. Special note: Take special
care not to over extend any brake lines and/or hoses.
Working on the driver side, remove and discard the stock
rear block. Repeat procedure on the passenger side.
96. Working on the driver side, place a pair of “C” clamp
vise grips on each side of the stock centering bolt. Carefully
remove the stock centering bolt and nut and discard.
Carefully remove the “C” clamp vise grips that are holding
the stock springs together. Special note: Be very
carefully when removing the “C” clamps, the stock
springs are under tension and can be dangerous.
Repeat procedure on passenger side.
97. Locate (2) new rear add-a-leaf, (2) 3/8” x 6” centering
bolt and (2) 3/8” fine nut from box kit 81350. Install the new
rear add-a-leaf into the stock spring assembly. Secure the
new rear add-a-leaf to the stock spring assembly using the
new 3/8” center bolt and nut. Torque to 28 ft. lbs. Special
note: If the new add-a-leaf that you are installing into
the stock spring assembly has an offset center hole
location, place the longest side of the add-a-leaf
towards the rear of the vehicle. Also the new add-a-leaf
should be installed into the stock spring assembly in
progression in order, from longest to shortest. The
new add-a-leaf should be installed between the stock
overload and the stock spring pack. The stock
overload is usually the un-arched spring at the bottom
of the stock leaf pack. Also, Tuff Country EZ-Ride
Suspension recommends not using any air tools when
installing the new add-a-leafs into the stock spring
assembly. If air tools are used the centering bolt may
strip, causing the stock spring assembly to come
apart. With a suitable cutting tool, cut off the extra
thread from the new centering bolt. Repeat procedure
on passenger side.
98. Locate (2) new 3” lifted blocks. Working on the driver
side, install the new 3” lifted block into the stock location.
Repeat procedure on the passenger side.
99. Carefully raise up on both hydraulic floor jacks at the
same time until the stock spring assembly sits flush with the
newly installed 3” lifted block.
100. Locate (4) 9/16” x 2 3/4” x 12 5/8” square u-bolts.
Locate (8) 9/16” u-bolt high nuts and (8) u-bolt washers
from hardware bag 916NW. Also, locate the stock upper
and lower u-bolt plates that were removed from step # 95.
Working on the driver side, install the new u-bolts into the
stock location and secure using the new 9/16” high nuts
and washers. Special note: Make sure to re-install the
stock upper and lower u-bolt plates into the stock
location. Torque to 120 ft lbs. Repeat procedure on
passenger side.
101. Locate (2) new rear shock relocation brackets. Locate
(2) 9/16” x 3” bolts, (4) 1/2” USS flat washer and (2) 9/16”
unitorque nuts from hardware bag 14957NB4. Locate (2)
7/16” x 1 1/4” bolt, (4) 3/8” USS flat washers and (2) 7/16”
unitorque nuts from hardware bag 14957NB2. Also, locate
(2) S10019 crush sleeves from hardware bag 14957SL.
Working on the driver side, install the new shock relocation
bracket into the stock location and secure using the new
9/16” x 3” bolt, hardware and (1) S10019 crush sleeve. Do
not tighten at this point. Make sure that the new rear
shock relocation bracket is sitting flush with the stock shock
bracket, carefully drill a 7/16” hole in the bottom of the stock
shock bracket and the newly installed shock relocation
bracket. Secure the shock relocation bracket to the stock
shock bracket using the new 7/16” x 1 1/4” bolt and
hardware. Move back the new 9/16” bolt and add some
thread locker or lock tite and torque to 112 ft lbs. Now
move back to the new 7/16” hardware and add some
thread locker or lock tite and torque to 35 ft lbs. Repeat
procedure on the passenger side.
Photo # 91