PRO COMP 51801B-1 Suspension Component Box Installation Manual

Introduction

This manual provides detailed instructions for the proper installation and maintenance of the PRO COMP 51801B-1 Suspension Component Box. This component is designed for use with 6-inch lift kits, specifically for 1999-2009 GM 2500HD 4WD vehicles. Please read all instructions thoroughly before beginning installation.

Safety Information

• Professional Installation Recommended: Installation of suspension components requires specialized tools and knowledge. It is highly recommended that this product be installed by a certified professional.
• Vehicle Support: Always ensure the vehicle is properly supported on a level surface using appropriate jack stands before working underneath.
• Personal Protective Equipment: Wear appropriate personal protective equipment, including safety glasses and gloves, during installation.
• Torque Specifications: Adhere strictly to all specified torque values for fasteners. Improperly torqued fasteners can lead to component failure.
• Post-Installation Check: After installation, perform a thorough inspection of all components and fasteners. Re-check torque after the first 500 miles of operation.

Package Contents

Verify that all components are present before beginning installation. The PRO COMP 51801B-1 Suspension Component Box includes:

• Installation Hardware

Note: This is "Box 1" of a multi-box lift kit (PN[K1084B/K1084BP]). Ensure you have all necessary boxes and components for the complete lift system.

Installation Instructions

These instructions are general guidelines. Refer to the complete lift kit manual (PN[K1084B/K1084BP]) for specific vehicle-model installation steps and detailed diagrams.

1. Prepare Vehicle: Park the vehicle on a level surface. Engage the parking brake. Loosen lug nuts on the front wheels. Raise the front of the vehicle and support it securely with jack stands under the frame rails. Remove the front wheels.
2. Disassembly: Follow the specific instructions in your main lift kit manual for disassembling existing suspension components. This typically includes disconnecting steering components, brake lines, ABS lines, and removing factory shocks, springs, and control arms.
3. Component Placement: Position the components from the 51801B-1 box according to the main lift kit manual. This box primarily contains hardware necessary for the 6-inch lift.
4. Secure Components: Install all new hardware and components, ensuring proper alignment and fitment. Do not fully tighten fasteners at this stage.
5. Reassembly: Reattach all disconnected components (steering, brake lines, ABS lines) as per the main lift kit manual. Ensure no lines are stretched or pinched.
6. Final Torque: Once the vehicle is on the ground and suspension is settled, tighten all fasteners to the torque specifications provided in the main lift kit manual.
7. Wheel Alignment: A professional wheel alignment is mandatory immediately after installation to ensure proper vehicle handling and tire wear.

Image: The PRO COMP 51801B-1 Suspension Component Box, containing essential hardware for a 6-inch lift kit. This image shows the typical packaging and contents of the component box.

Post-Installation Checks and Operation

After completing the installation of the PRO COMP 51801B-1 Suspension Component Box and the associated lift kit, perform the following checks:

• Initial Drive Test: Drive the vehicle slowly in a safe area. Listen for any unusual noises, vibrations, or changes in steering feel.
• Brake System Check: Verify proper brake function. Ensure brake lines are not stressed or rubbing.
• Steering Check: Confirm full steering range without interference or binding.
• Fastener Re-torque: After the first 500 miles of driving, re-check the torque on all fasteners installed or loosened during the lift kit installation. This is crucial for safety and component longevity.

Maintenance

Regular maintenance is essential for the longevity and safe operation of your PRO COMP suspension system:

• Periodic Inspection: Visually inspect all suspension components, including those from the 51801B-1 box, every 3,000 to 5,000 miles or during routine oil changes. Look for signs of wear, damage, or loose fasteners.
• Fastener Torque: Periodically re-check the torque on all critical fasteners, especially after off-road use or heavy loads.
• Cleaning: Keep suspension components clean from excessive dirt, mud, and road salt to prevent corrosion and premature wear.

Troubleshooting Common Issues

If you experience issues after installing the lift kit, consider the following:

• Unusual Noises: Check for loose fasteners, components rubbing, or improper installation. Re-verify all torque specifications.
• Poor Handling/Steering: This often indicates an incorrect wheel alignment. Ensure a professional alignment has been performed. Also, check for loose steering components.
• Vibrations: Check driveshaft angles, tire balance, and wheel alignment. Loose components can also cause vibrations.
• Uneven Ride Height: Double-check that all components were installed correctly and on the appropriate sides of the vehicle.

For persistent issues, consult with a certified automotive technician or contact PRO COMP customer support.

Specifications

Warranty Information

PRO COMP products are backed by a manufacturer's warranty. For specific details regarding the warranty coverage for the 51801B-1 Suspension Component Box and associated lift kits, please refer to the warranty documentation included with your complete PRO COMP lift kit or visit the official PRO COMP website. Keep your proof of purchase for warranty claims.

Customer Support

For technical assistance, installation questions, or warranty inquiries, please contact PRO COMP customer support directly. Refer to the official PRO COMP website for the most current contact information, including phone numbers and online support resources.

Official PRO COMP Website: www.procompusa.com