2013 Chevrolet Avalanche Owner Manual - Page 360

10-26 Vehicle Care To get an accurate reading, the vehicle should be on a level surface. If the level is below the bottom of the fill plug (A) hole, some lubricant will need to be added. Add enough lubricant to raise the level to the bottom of the fill plug (A) hole. Use care not to overtighten the plug. When to Change Lubricant Refer to Maintenance Schedule on page 11‑3 to determine how often to change the lubricant. What to Use Refer to Recommended Fluids and Lubricants on page 11‑12 to determine what kind of lubricant to use. Front Axle When to Check and Change Lubricant It is not necessary to regularly check front axle fluid unless there is a leak suspected or an unusual noise is heard. A fluid loss could indicate a problem. Have it inspected and repaired. How to Check Lubricant To get an accurate reading, the vehicle should be on a level surface. A. Fill Plug B. Drain Plug . When the differential is cold, add enough lubricant to raise the level from 0 mm (0 in) to 3.2 mm (1/8 in) below the fill plug (A) hole. When the differential is at operating temperature (warm), add enough lubricant to raise the level to the bottom of the fill plug (A) hole. .