Tire & wheel information – Trail Master Suspension TM102N GM 1500 4WD/2WD SUSPENSION 4 LIFT KIT User Manual

Page 3

TM102N

Revised

2.4.14

Before Starting Installation

Carefully read all warnings and instructions com-

pletely before beginning.

2. Verify all parts have been received in this kit by

checking the parts list at the end of this document.

3. Only install this kit on the vehicle for which it is

specified. If anytime during the installation you en-

counter 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 direction.

5. Measure ride height with the vehicle supporting its

own weight on level ground. To settle the suspension,

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 nega-
tive cable first, then positive cable.

Torque Specifications:

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

3/8”-16 30 40

3/8”-24 35 45

7/16”-14 50

7/16”-20 55

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 combinations should be test fit
prior to installation. Tire and wheel choice is crucial in assur-
ing proper fit and performance of your modified vehicle.
Body and or fender modifications may be required to prop-
erly install the maximum tire diameter and maximum wheel
width listed. In most cases modifications may consist of
minimal trimming of plastic bumper valances and or plastic
fender liners. Use of wider than factory rims with less back-
spacing is more likely to result in tire to fender contact and
require more modification. The factory wheel and tire com-
bination will not fit once this kit is installed.

For this application:
285/70-17 tires on aftermarket rims
not to exceed 9” in width and backspacing of 4.5”.
295/65-18 tires on aftermarket rims
not to exceed 9” in width and backspacing of 4.5” to 5”.
295/55-20 tires on aftermarket rims
not to exceed 9” in width and backspacing of 4.5” to 5”.

NOTE

On some vehicles the driver’s side OE chassis wire har-
ness that connects to the ABS wire may be shorter, from
the factory, than others. If the line needs to be extended
GM #19149296 (ACD#PT2232) can be installed into the
chassis wire harness.