For Chevrolet Avalanche 2500 2002-2006. For Chevrolet Suburban XL 2500 2000-2020. For GMC Yukon XL 2500 2000-2020. 4、Stability: Reduce the sag of the rear end of the car and soften sharp rebounds. 3、Reliability: No air leaking, No need for air lines and compressors.