RetraxPRO Retractable Tonneau Cover Retractable Tonneau Cover; w/Wide RETRAX Rail; Rugged Aluminum Construction CHEVROLET GMC SIERRA 1500 SIERRA 1500 CLASSIC SIERRA 1500 HD SIERRA 1500 HD CLASSIC SIERRA 2500 SIERRA 2500 HD SIERRA 2500 HD CLASSIC SILVERADO 1500 SILVERADO 1500 CLASSIC SILVERADO 1500 HD SILVERADO 1500 HD CLASSIC SILVERADO 2500 SILVERADO 2500 HD SILVERADO 2500 HD CLASSIC BASE CLASSIC HYBRID CLASSIC LS CLASSIC LT CLASSIC SL CLASSIC SLE CLASSIC SLT CLASSIC SS CLASSIC WT DENALI HT HYBRID LS LT SL SLE SLT SS WT Z71 1999 2000 2001 2002 2003 2004 2005 2006 2007 4.3L (262) Vortec 4.3L L35 (262) Vortec 4.3L LU3 (262) Vortec 4.8L GEN III LR4 Vortec (294) 5.3L GEN III Electric/Gas LM7 (325) 5.3L GEN III Flex L59 Vortec (325) 5.3L GEN III L33 Vortec (325) 5.3L GEN III LM7 Vortec (325) 6.6L Duramax Turbo Diesel LB7 (403) 6.6L Duramax Turbo Diesel LBZ (403) 6.6L Duramax Turbo Diesel LLY (403) 6L GEN III Bi-Fuel LQ4 Vortec (364) 6L GEN III CNG LQ4 Vortec (364) 6L GEN III LQ4 Vortec (364) 6L GEN III LQ9 HO Vortec (364) 8.1L L18 Vortec (496) BI-FUEL CNG DIESEL ELECTRIC/GAS FLEX GAS Retrax Retrax RetraxPRO Retractable Tonneau Cover - 40412 40412 Tonneau Cover
