2008 Hummer H3 Alpha Owner's Manual - Page 303

To disconnect the jumper cables from both vehicles, do the following: 1. Disconnect the black negative (−) cable from the vehicle that had the dead battery. 2. Disconnect the black negative (−) cable from the vehicle with the good battery. 3. Disconnect the red positive (+) cable from the vehicle with the good battery. 4. Disconnect the red positive (+) cable from the other vehicle. 5. Return the positive (+) battery terminal cover to its original position. How to Check Lubricant 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. To get an accurate reading, the vehicle should be on a level surface. 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 6-12 to determine which kind of lubricant to use. 5-45