Installation Procedure

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With an assistant, install the lift gate to the vehicle.
Install the bolts that retain the lift gate to the body.
NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Tighten
1. Tighten the bolts to 25 N.m (18 lb ft).

Fig 1: Installing Bolts That Retain Lift Gate To Body

Courtesy of GENERAL MOTORS CORP.

Install the lift gate struts. Refer to Strut Replacement - Lift Gate .
Connect the washer fluid hose.
Connect the electrical connectors, as needed.
Install the roof rear header garnish molding. Refer to GARNISH MOLDING REPLACEMENT - REAR UPPER (AVALANCHE/ESCALADE EXT) or GARNISH MOLDING REPLACEMENT - REAR UPPER (TAHOE/YUKON/ESCALADE/SUBURBAN) in Interior Trim.