2001-2005 Hummer H2 4WD Superlift 6″ Lift System Front Installation Instructions
Installation requires a professional mechanic. Prior to beginning, inspect the vehicles steering, driveline, and brake systems, paying close attention to the suspension link arms and bushings, anti-sway bars and bushings, tie rod ends, pitman arm, ball joints and wheel bearings. Also check the steering sector-to-frame and all suspension-to-frame attaching points for stress cracks. The overall vehicle must be in excellent working condition; repair or replace all worn parts. Read instructions several times before starting. Be sure you have all needed parts and know where they install. Read each step completely as you go.
NOTES:
• Rear lift is sold separately and includes its own instruction form.
• Prior to beginning the installation, check all parts and hardware in the box with the parts list below. If you find a packaging error, contact Superlift directly. Do not contact the dealer where the system was originally purchased. You will need the control number from each box when calling; this number is located at the bottom of the part number label and to the right of the bar code.
• A replacement front driveshaft is required. This driveshaft is sold separately and is available from Superlift (Part #3406).
• A special tool is required to load/unload the torsion bars (step 2). Other special tools are recommended to detach/attach the pitman/idler studs. Refer to the factory service manual.
• Front end realignment is necessary.
• This system utilizes the stock torsion bars, which normally yield the best ride quality. But, if the “final product” ride and handling seem too soft, heavier Gross Vehicle Weight Rating (GVWR) bars can be installed. Generally, heavier torsion bars are only needed to compensate for the extra weight of a winch or snowplow, or when the truck is subjected to extreme off-road use. Also, wider tires and wheels proportionally increase the leverage on the bars, which results in lower ride height and a “spongier” ride. GM offers torsion bars with various rates that are heavier than stock. Your vehicle’s existing torsion bar rate can be identified by a 3-letter code stamped into the bars’ ends. The code is also on an adhesive tag wrapped around the bars.
• An arrow on diagrams indicates which direction is toward the front of the vehicle.
• A foot-pound torque reading is given in parenthesis ( ) after each appropriate fastener.
• Do not fabricate any components to gain additional suspension height.
• Prior to drilling or cutting, check behind the surface being worked on for any wires, lines, or hoses that could be damaged.
• After drilling, file smooth any burrs and sharp edges.
• Prior to operating a torch or saw, protect any heat-sensitive components located in the immediate area by covering them with a water-saturated cloth. Most undercoating are flammable but can be extinguished using a water-filled spray bottle. Have a spray bottle and an ABC rated fire extinguisher on hand.
• Paint or undercoat all exposed metal surfaces.
• Prior to attaching components, be sure all mating surfaces are free of grit, grease, undercoating, etc.
• A factory service manual should be on hand for reference.
• Use the check-off box “□” found at each step to help you keep your place. Two “□□” denotes that one check-off box is for the driver side and one is for the passenger side. Unless otherwise noted, always start with the driver side.
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