Fluid and Lubricant Recommendations

Usage	Fluid/Lubricant
Engine Oil	The engine requires engine oil approved to the dexos™ specification. Oils meeting this specification can be identified with the dexos™ certification mark. Look for and use only an engine oil that displays the dexos™ certification mark of the proper viscosity grade. SAE 5W-30 is the best viscosity grade for the vehicle. Do not use other viscosity oils such as SAE 10W-30, 10W-40, or 20W-50.
Engine Coolant	50/50 mixture of clean, drinkable water and use only DEX-COOL® Coolant GM P/N 12346290 (Canadian P/N 10953464).
Hydraulic Brake System	DOT 3 Hydraulic Brake Fluid GM P/N 12377967 (Canadian P/N 89021320)
Windshield Washer	Optikleen® Washer Solvent
Power Steering System	GM Power Steering Fluid GM P/N 89021184 (Canadian P/N 89021186)
Automatic Transmission - 2ML70	DEXRON®-VI GM P/N 88861003 (Canadian P/N 88861004)
Key Lock Cylinders	Multi-Purpose Lubricant, Superlube GM P/N 12346241 (Canadian P/N 10953474)
Chassis Lubrication	Chassis Lubricant GM P/N 12377985 (Canadian P/N 88901242) or lubricant meeting requirements of NLGI #2, Category LB or GC-LB
Front Axle - 1500 Series Vehicles with Four-Wheel Drive	SAE 80W-90 Axle Lubricant GM P/N 89021671 (Canadian P/N 89021672)
Front Axle - 2500 Series Vehicles with Four-Wheel Drive	Synthetic Gear Oil GM P/N 89021677 (Canadian P/N 89021678)
Rear Axle	Synthetic Gear Oil GM P/N 89021677 (Canadian P/N 89021678)
Transfer Case - Four-Wheel Drive	DEXRON®-VI GM P/N 88861003 (Canadian P/N 88861004)
Front Axle Propshaft Spline or One-Piece Propshaft Spline - Two-Wheel Drive with Automatic Transmission	Spline Lubricant, Special Lubricant GM P/N 19257121 (Canadian P/N 19257122)
Hood Hinges	Multi-Purpose Lubricant, Superlube GM P/N 12346241 (Canadian P/N 10953474)
Outer Tailgate Handle Pivot Points	Multi-Purpose Lubricant, Superlube GM P/N 12346241 (Canadian P/N 10953474)
Weatherstrip Conditioning	Weatherstrip Lubricant GM P/N 3634770 (Canadian P/N 10953518) or Dielectric Silicone Grease GM P/N 12345579 (Canadian P/N 10953481)
Weatherstrip Squeaks	Synthetic Grease with Teflon, Superlube GM P/N 12371287 (Canadian P/N 10953437)