2003-2006 Chevrolet Silverado 1500 LS LT SS Base Hybrid WT Z71 (Bed Length: 78.0 & Bed Type: Fleetside & Doors: 4 & Body: Extended Cab Pickup & Cylinder: 6, 8); 2003-2004 Chevrolet Silverado 2500 LT Base LS (Bed Length: 78.0 & Bed Type: Fleetside & Doors: 4 & Body: Extended Cab Pickup & Cylinder: 8 | Qualifier: Short Bed); 2003-2006 Chevrolet Silverado 2500 HD LS LT (Bed Length: 78.0 & Bed Type: Fleetside & Doors: 4 & Body: Extended Cab Pickup & Cylinder: 8 | Qualifier: Short Bed); 2003-2006 GMC Sierra 1500 SLE SLT WT (Bed Length: 78.0 & Bed Type: Fleetside & Doors: 4 & Body: Extended Cab Pickup & Cylinder: 6, 8 | Qualifier: Short Bed); 2003-2004 GMC Sierra 2500 Base SLE SLT (Bed Length: 78.0 & Bed Type: Fleetside & Doors: 4 & Body: Extended Cab Pickup & Cylinder: 8 | Qualifier: Short Bed); 2003-2006 GMC Sierra 2500 HD SLE SLT Base SL (Bed Length: 78.0 & Bed Type: Fleetside & Doors: 4 & Body: Extended Cab Pickup & Cylinder: 8 | Qualifier: Short Bed)