Autoptim 1 Inch Rear Leveling Lift Block Kit – Replacement For 1999-2021 Gmc Silverado Sierra 1500 2Wd/4Wd, 1 Strut Spacer Extended Square U-Bolts

COMPATIBILITY WITH: Leveling lift block kit replacement for 1999-2021 GM Silverado Sierra 1500 2WD/4WD. Will Raise your truck 1 in the rear. Contents: 2 X 1” rear blocks & 4 U bolts.|SAFE DRIVING: Forged aircraft billet aluminum T6 treated. 10.9 Grade premium bolts, excellent resistance to corrosion by black anodized surface process. Even in extreme riding conditions, the leveling kits also provide safe driving.|MODIFICATION: Strut spacer kit can provide unmatched ground clearance to conquer on and off-Road obstacles and allowing to fit larger custom rims and tires. Maintains your original ride quality, steering quality and driving comfort.|LEVELING KIT BENEFITS: Lift blocks kit absorb noise and vibrations, and are tapered for perfect pinion alignment. Made for maximum u bolt clamp force with an even distribution of pressure, axle u bolts eliminate flexing and provide the strength to maintain original vehicle handling.|INTIMATE SERVICE: We provide with 12 months customer service. If you have any questions before or after purchasing, we will provide you with assistance and service|WARNING: Professional installation by a certified mechanic is REQUIRED to prevent vehicle damage, safety hazards, or voided warranties. Ensure compatibility with your vehicle model/year and existing systems. Post-installation, avoid aggressive driving/overloading due to increased rollover risks and reduced load capacity. Regularly inspect components every 3 months/5,000 km for wear, cracks, or loosening. Compliance with local laws (height limits, certifications) and insurance policies is the buyer’s responsibility. Manufacturer not liable for misuse, improper installation, or lack of maintenance