Supreme Suspensions - Chevy Trailblazer Lift Kit 3" Front Lift Strut Spacers + 3" Rear Lift Spring Spacers (Black) FITMENT: 2002 - 2009 Chevrolet Trailblazer (2WD 4WD), 2002 - 2009 GMC Envoy (2WD 4WD). CONTENTS: 2x High Crystalline Delrin Front Strut Spacers, 2x Aircraft Billet Rear Spring Spacers, Installation Hardware, Installation Instructions, and Supreme Suspensions Pro Pack. TECHNICAL NOTES: 3 inch front suspension lift and 3 inch rear suspension lift. Factory shocks can be reused without compromising ride quality. INSTALLATION: Easy bolt-on installation takes 2 to 4 hours without the need for special tools. An alignment is recommended after install. BENEFITS: Improves the look of your vehicle and increases ground clearance, allowing you to fit larger custom rims and tires.