Work-Rite(R) Air Helper Spring Kit Work-Rite(R); Air Helper Spring Kit; Rear; Cab And Chassis; Incl. Brackets; Load Assist Springs; Hardware; No Drilling Required; OEM Number W277608633 CHEVROLET GMC SIERRA 3500 HD SILVERADO 3500 HD DENALI LT LTZ SLE SLT WT 2011 2012 6.6L Duramax Turbo Diesel LGH (403) 6.6L Duramax Turbo Diesel LML (403) 6L GEN IV Flex L96 Vortec (364) 6L GEN IV L96 Vortec (364) DIESEL FLEX GAS Firestone Ride-Rite Firestone Ride-Rite Work-Rite Air Helper Spring Kit - 8633 8633 Suspension Load Leveling Kit
