How do you add oil to rear axle 2000 olds bravada?

To add oil to the rear axle of a 2000 Oldsmobile Bravada, first locate the rear differential cover. Remove the fill plug, which is usually located on the side of the differential, using a socket or wrench. Using a fluid pump or a squeeze bottle, add the appropriate differential oil until it reaches the bottom of the fill hole. Reinstall the fill plug securely after adding the oil.