What type of gear oil does a 2009 Chevy silverado rear end take?

A 2009 Chevy Silverado typically requires 75W-90 gear oil for its rear differential. If the vehicle is equipped with a limited-slip differential, it's advisable to add a limited-slip additive or use a gear oil specifically formulated for limited-slip differentials. Always consult the owner's manual for specific recommendations and specifications for your particular model and configuration.