Applications: For 2007-2008 GMC Sierra 1500 4WD Only On average shocks and struts can last 50,000-100,000 miles under ideal driving conditions. Many factors can affect the lifespan of these components to include: bad roads, heavy loads, towing, hard braking and aggressive driving. Signs of Worn Struts and Shocks: Erratic Braking. Noticeable Vibrations While Driving. Fluid Leakage. Irregular Tire Wear. Hovering Front End. Bumpy Ride. Clunking Noises When Hitting a Bump. Advantages of Leveling Kit: .
