2001 Chevrolet Tracker Owner's Manual - Page 260

How to Check Lubricant Front Axle When to Check and Change Lubricant Refer to the Maintenance Scheduleto determine how often to check the lubricant and when change it. See to "Periodic Maintenance Inspections'' and "Scheduled Maintenance Services" inthe Index. How to Check Lubricant I If the level is below the bottom of filler plug hole, the you'll need to add some lubricant. Add enough lubricant to raise the level to the bottomof the filler plug hole. What to Use Refer to the Maintenance Scheduleto determine what kind of lubricant to use. See "Recommended Fluids and Lubricants" in the Index. If the levelis below the bottom of the filler plug hole, you may need to add some lubricant.