Download 2000-UP GMC Yukon 2/3 Torsion Bar/Coil Spring Complete Lowering Kit Installation Instructions KIT INSTALLATION As this is a relatively involved installation, we recommend that a qualified mechanic at a properly equipped facility perform it. We also recommend that the installation be performed on a firm, flat and level surface, such as seasoned asphalt or concrete. The use of safe and properly maintained equipment is very important! In order to document any possible irregularities in the factory ride height of your vehicle, please take a few moments to fill out the Belltech Vehicle Inspection Record included with these instructions. We also recommend measuring and recording all stock driveline angles prior to installing this kit. This information may be helpful if vibration problems arise after installation. 1. Jacking, Supporting, and Preparing the Vehicle a) Working from the LH front wheel opening, measure the LH ride height as described by the Belltech Vehicle Inspection Record. Repeat for the RH side of vehicle. Be sure to record these measurements so that proper ride-height can be set in subsequent Steps. b) Block the rear wheels of the vehicle with appropriate wheel chocks. Make sure the vehicle’s transmission is in “Park” (automatic) or 1st gear (manual-if offered). Activate the parking brake. c) Loosen, but DO NOT REMOVE, the front and rear wheel lug nuts. d) Using a properly rated floor jack, lift the front of the vehicle off the ground.