Trail Master Suspension TM104N CHEVEROLET/GMC 1/2 TON 4WD SUSPENSION LIFT KIT - Manual (Page 3)

3
TM104N
Revised
1.27.14
Before Starting Installation
1. Carefully read all warnings and instructions
completely before beginning.
2. Verify all parts have been received in this kit by
checking the parts list at the end of this docu-
ment.
3. Only install this kit on the vehicle for which
it is specified. If anytime during the installation
you encounter something different from what is
outlined in the instructions, call technical support
at (877) 695-7812.
4. Park vehicle on a clean, dry, flat, level surface
and block tires so vehicle cannot roll in either di-
rection.
5. Measure ride height with the vehicle supporting
its own weight on level ground. To settle the sus-
pension, the vehicle should be driven forward at
least 10 feet immediately prior to taking these
measurements. Ride height is the measurement
from the center of the axle straight up (vertical) to
the fender lip. Record this measurement for all
four wheels.
Engine Compartment
1. Disconnect both battery cables. Disconnect
negative cable first, then positive cable.
Wheel & Tire Requirements
Torque Specifications:
See factory service manual for torque values when
reusing OE fasteners.
See factory service manual for torque values when re-using
OE fasteners.
Bolt Size Grade 5 (ft.-lbs.) Grade 8 (ft.-lbs.)
1/4”-20 10 10
1/4”-28 10 12.5
5/16”-18 17 22.5
5/16”-24 20 25
3/8”-16 30 40
3/8”-24 35 45
7/16”-14 50 65
7/16”-20 55 70
1/2”-13 75 100
1/2”-20 80 115
9/16”-12 105 135
9/16”-18 115 150
5/8”-11 150 195
5/8”-18 160 210
3/4”-16 175 225
NOTE
Adhere to recommendations when replacement fas-
teners, retainers and keepers are called out in the
factory service manual. When re-assembling the ve-
hicle it is recommended by the vehicle manufacturer
that certain fasteners are replaced in order to main-
tain proper retention characteristics. This system
may not include all replacement hardware as recom-
mended by the factory service manual. Additional
replacement hardware should be obtained prior to
installation of this system to meet the requirements
of the factory service manual.
NOTE
Kit parts are prefaced by the word kit and appear in
bold print.
Tire & Wheel Information:
Due to differences in manufacturing, dimensions
and inflated measurements, tire and wheel combi-
nations should be test fit prior to installation. Tire
and wheel choice is crucial in assuring proper fit,
performance, and the safety of your Trailmaster
equipped vehicle. For this application, a wheel not
to exceed 9” in width with a maximum backspacing
of 5 1/4” must be used. Additionally, a quality tire
of radial design, not exceeding 35” tall X 12.5”
wide is recommended. Please note that the use of a
35” X 12.5” tire may require fender modification.
Violation of these recommendations will not be en-
dorsed as acceptable by Trailmaster Suspension and
will void any and all warranties either written or
implied. 2005 trucks require a 17” wheels to clear
the calipers.
If your truck has a tire pressure sensors on the fac-
tory wheels please contact the wheel manufactures
for proper installation and removal.
Factory rims can be used.