Service and Maintenance  
					421  
					Recommended Fluids, Lubricants, and Parts  
					Recommended Fluids and Lubricants  
					This maintenance section applies to vehicles with a gasoline engine. If the vehicle has a diesel engine, see “Recommended Fluids and Lubricants”  
					in the Duramax diesel supplement.  
					Fluids and lubricants identified below by name or specification, including fluids or lubricants not listed here, can be obtained from your dealer.  
					Usage  
					Fluid/Lubricant  
					Automatic Transmission (8-Speed Transmission) DEXRON-HP Automatic Transmission Fluid.  
					Automatic Transmission (10-Speed Transmission) DEXRON ULV Automatic Transmission Fluid.  
					Chassis Lubrication  
					Engine Coolant  
					Chassis lubricant meeting requirements of NLGI #2, Category LB or GC-LB.  
					50/50 mixture of clean, drinkable water and use only DEX-COOL coolant. See Cooling System  
					0 343.  
					Engine Oil  
					Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1  
					full synthetic is recommended. See Engine Oil 0 339.  
					Front and Rear Axle Driveshaft Splines  
					See your dealer.  
					Front Axle (Four-Wheel Drive) and Rear Axle See your dealer.  
					Hydraulic Brake System  
					DOT 4 Hydraulic Brake Fluid. See Brake Fluid 0 351.  
					Key Lock Cylinders, Hood Hinges, Body Door Multi-Purpose Lubricant, Superlube. See your dealer.  
					Hinge Pins, Tailgate Hinge and Linkage, Fuel  
					Door Hinge, Tailgate Handle Pivot Points,  
					Hinges, Latch Bolt, and Linkage  
					Transfer Case (Four-Wheel Drive)  
					Windshield Washer  
					DEXRON-VI Automatic Transmission Fluid.  
					Automotive windshield washer fluid that meets regional freeze protection requirements.