Parts from the Drain plug category for other GMC models:
GMC Acadia I oil drain plug
GMC YUKON (GMT900) oil drain plug
GMC YUKON XL 1500 oil drain plug
GMC Terrain I oil drain plug
GMC YUKON XL 1500 oil drain plug
GMC Envoy II SUV oil drain plug
GMC Yukon I (GMT400) oil drain plug
GMC Yukon XL 2500 oil drain plug
GMC SAVANA 1500 Standard Cargo Van oil drain plug
GMC Sierra Pickup oil drain plug
GMC Sierra III 1500 Crew Cab Pickup oil drain plug
GMC G2500 Vandura oil drain plug
GMC Yukon II (GMT800) oil drain plug
GMC SAVANA 1500 Standard Passenger Van oil drain plug
GMC Sierra III 1500 Extended Cab Pickup oil drain plug

Engine: other spare parts for your Sierra 3500HD III Crew Cab Pickup model : GMC Sierra 3500HD III Crew Cab Pickup Camshaft, GMC Sierra 3500HD III Crew Cab Pickup Con Rod Bearing, GMC Sierra 3500HD III Crew Cab Pickup Crankcase Breather, GMC Sierra 3500HD III Crew Cab Pickup Crankshaft, GMC Sierra 3500HD III Crew Cab Pickup Cylinder Head Bolts, GMC Sierra 3500HD III Crew Cab Pickup Engine Block, GMC Sierra 3500HD III Crew Cab Pickup Engine Mount, GMC Sierra 3500HD III Crew Cab Pickup Engine Oil, GMC Sierra 3500HD III Crew Cab Pickup Exhaust Valve, GMC Sierra 3500HD III Crew Cab Pickup Inlet Valves, GMC Sierra 3500HD III Crew Cab Pickup Intake Manifold, GMC Sierra 3500HD III Crew Cab Pickup Oil Dipstick, GMC Sierra 3500HD III Crew Cab Pickup Oil Pump, GMC Sierra 3500HD III Crew Cab Pickup Oil Sump, GMC Sierra 3500HD III Crew Cab Pickup Piston, GMC Sierra 3500HD III Crew Cab Pickup Piston Rings, GMC Sierra 3500HD III Crew Cab Pickup Rocker Cover, GMC Sierra 3500HD III Crew Cab Pickup Tappet, GMC Sierra 3500HD III Crew Cab Pickup Timing Belt Cover