How much gear oil does a 1999 Z71 take?

A 1999 Chevy Z71 typically requires about 2.5 to 3 quarts of gear oil for the front differential and around 3 quarts for the rear differential, depending on the specific axle configuration. It's essential to check the owner's manual or consult with a mechanic for the exact specifications and recommendations. Always ensure you use the correct type of gear oil as specified by the manufacturer.