Installation Guide for Rough Country 110100D 6-Inch Lift Kit

Quick Guide

This installation guide is intended for the Rough Country 110100D 6-inch lift kit designed for GM 2025 1500 trucks. Rough Country strongly recommends that a certified technician perform the installation, as it requires professional knowledge of vehicle disassembly and reassembly procedures. Failure to follow these instructions may jeopardize vehicle safety.

Important Safety Warnings:

• The electric power steering must be unplugged before removing any steering components to prevent damage.
• Trucks with a mass damper on the front differential require the damper to be removed.
• Always wear seat belts and avoid situations where a side rollover may occur, as taller vehicles are more prone to rolling.
• Ensure wheels clear the brake caliper completely during installation; any pressure on the caliper can cause braking system errors requiring a GM dealership reset.

Tools and Torque Specifications

Ensure you have all necessary tools before beginning, including a floor jack, jack stands, various metric sockets/wrenches (10mm to 36mm), a #30 Torx bit, a reciprocating saw, a hammer, and locking pliers. Refer to the torque specifications table in the manual for proper tightening of Grade 5/8 and Class 8.8/10.9 hardware.

Front Suspension Installation

The front installation involves significant disassembly of the suspension and steering components. Key steps include:

• Removing factory skid plates, tie-rod ends, brake lines, and ABS sensors.
• Removing the CV axle nut, brake rotor, and knuckle assembly.
• Removing the sway bar, lower control arms, and front driveshaft.
• Removing the rear crossmember and differential to install the supplied diff drop brackets.
• Trimming the driver-side rear crossmember mount as specified.
• Installing the new front and rear crossmembers, lower control arms, and strut spacers.
• Reassembling the suspension, including installing the new lifted knuckles, CV spacers, and tie-rod ends.
• Reconnecting all electrical components, including the rack and pinion and differential actuator.
• Installing the front and lower skid plates (note: models with an intercooler do not install the front skid plate).

Rear Suspension Installation

The rear installation focuses on lifting the rear suspension using blocks and U-bolts. Key steps include:

• Removing the rear shocks and brake line brackets.
• Installing the supplied brake line drop brackets.
• Removing the stock U-bolts and lowering the axle.
• Installing the new lift blocks with supplied 9/16" U-bolts, ensuring the short side of the block faces the front of the vehicle.
• Securing the lift blocks with 7/16" square U-bolts.
• Installing the new shock absorbers or relocating existing ones using the provided brackets for Adaptive Ride Control models.

Post-Installation Instructions

After installation, perform the following checks:

• Verify adequate clearance between all rotating, mobile, fixed, and heated members.
• Perform a steering sweep to ensure brake hoses have adequate slack.
• Have the vehicle aligned immediately by a qualified center to factory specifications (Caster: 4.0 +/- 1.0, Camber: -0.4 +/- 0.8, Toe In: 0.1 +/- 0.2).
• Check and retighten all wheels at 50 and 500 miles.
• Retighten all kit components at 500 miles and every 3,000 miles thereafter.
• Install the "Warning to Driver" decal on the sun visor.