Flush the differential in your 2001-2004 Chevy/GMC 6.6L LB7 Duramax with the correct Gear Oil. Conventional, full synthetic, and synthetic blend lubes are offered to fit your needs. Get the 75W-90, 75W-140, 80W-90, 80W-140, or 85W-140 lube you need for your vehicle. Top manufactures like Royal Purple, Lucas Oil, AFE, Motorcraft, and Nitro Gear & Axle are available at XDP.
