NXt Running Board Bracket NXt; Running Board Bracket; GMC CHEVROLET SIERRA 1500 SIERRA 2500 HD SIERRA 3500 HD SILVERADO 1500 SILVERADO 2500 HD SILVERADO 3500 HD BASE DENALI HIGH COUNTRY LS LT LTZ SLE SLT SSV WT 2016 2014 2015 4.3L LV3 (262) Vortec 5.3L Ecotec3 L83 (325) 6.2L Ecotec3 L86 (376) 6.6L Duramax Turbo Diesel LML (400) 6L GEN IV CNG LC8 Vortec (364) 6L GEN IV Flex L96 Vortec (364) 6L GEN IV Flex LC8 Vortec (364) 6L GEN IV L96 Vortec (364) 6L GEN IV LC8 Vortec (364) FLEX CNG DIESEL GAS Dee-Zee Dee Zee NXt Running Board Bracket - DZ16317 DZ16317 Running Board Mount Kit