2015 Cadillac Escalade ESV Owner Manual - Page 310

Vehicle Care 1. Fill Plug 2. Drain Plug . 10-25 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 (1) hole. When the differential is at operating temperature (warm), add enough lubricant to raise the level to the bottom of the fill plug (1) hole. heard. A fluid loss could indicate a problem. Have it inspected and repaired. All axle assemblies are filled by volume of fluid during production. They are not filled to reach a certain level. When checking the fluid level on any axle, variations in the readings can be caused by factory fill differences between the minimum and the maximum fluid volume. Also, if a vehicle has just been driven before checking the fluid level, it may appear lower than normal because fluid has traveled out along the axle tubes and has not drained back to the sump area. Therefore, a reading taken five minutes after the vehicle has been driven will appear to have a lower fluid level than a vehicle that has been stationary for an hour or two. The rear axle assembly must be supported on a flat, level surface to get a true reading. How to Check Lubricant . What to Use Refer to Recommended Fluids and Lubricants on page 11-11 to determine what kind of lubricant to use. To get an accurate reading, the vehicle should be on a level surface. The proper level is 1.0 mm to 19.0 mm (0.04 in to 0.7 in) below the bottom of the fill hole, located on the rear axle. Add only enough fluid to reach the proper level. Rear Axle When to Check Lubricant It is not necessary to regularly check rear axle fluid unless a leak is suspected or an unusual noise is What to Use Refer to Recommended Fluids and Lubricants on page 11-11 to determine what kind of lubricant to use.