2007 Chevrolet Colorado Owner's Manual - Page 368

Rear Axle When to Check and Change Lubricant It is not necessary to regularly check rear axle fluid unless you suspect there is a leak or you hear an unusual noise. A fluid loss could indicate a problem. Have it inspected and repaired. The proper level is from 0 to 3/8 inch (0 mm to 10 mm) below the bottom of the filler plug hole, located on the rear axle. What to Use See Recommended Fluids and Lubricants on page 455 to determine which kind of lubricant to use. How to Check Lubricant Four-Wheel Drive Lubricant checks in this section apply to this vehicle. There are two additional systems that need lubrication. Transfer Case When to Check Lubricant Refer to the Maintenance Schedule to determine how often to check the lubricant. See Additional Required Services on page 448. How to Check Lubricant To get an accurate reading, the vehicle should be on a level surface. To get an accurate reading, the vehicle should be on a level surface. 368