Replacing a drive shaft doesn’t have to be complicated. This complete drive shaft assembly is pre-balanced and ready to install with 100% new yokes, tubes, constant velocity (CV) joints and universal joints. Overall Length Adjustable – Yes; Drive Shaft Wall Thickness (in) – .065″; Drive Shaft Length (in) – 83.25″; Greaseable Drive Shaft – Yes FEATURES: Engineered for superior durability, backed by a 1-year, unlimited mileage warranty Guaranteed precision fit for easy installation – Arrives to your home fully assembled (no flex plate) and balanced, ready to install! 100% NEW, Premium Quality ISO/TS 16949 – No Deposit or Returns Necessary Core Please note that this is the drive shaft or propeller shaft that runs from the front to the rear of your vehicle, connecting the transmission or transfer case to the rear differential. This is not the same as the CV axle, which connects the transmission or differential to the wheel. Fits 2001-2006 Chevy Silverado and GMC Sierra 1500HD Crew Cab 4WD with Automatic Transmission, 78″ Bed, 153″ Wheelbase. Also fits 2007 Silverado Classic and Sierra Classic with same option combination, but does not fit 1500 non-HD, 2500 or 3500 trucks. SPECIFICATIONS: INTERCHANGES WITH THE FOLLOWING PART NUMBERS: 91-04321 N, 91-04321N, 19104321-101, 19104321-102