2008 Chevrolet Tahoe Owner's Manual - Page 416

• For all 6.0L 1500 Series applications, the proper level is from 0.6 inch to 1.6 inches (15 mm to 40 mm) below the bottom of the filler plug hole, located on the rear axle. Add only enough fluid to reach the proper level. • The proper fill level for the 2500 Series is from 0 to 1/2 inch (0 to 13 mm) below the bottom of the filler plug hole, located at the front of the axle. Add only enough fluid to reach the proper level. Four-Wheel Drive 2500 Series To get an accurate reading, the vehicle should be on a level surface. Lubricant checks in this section also apply to these vehicles. There are two additional systems that need lubrication. Transfer Case When to Check Lubricant It is not necessary to regularly check transfer case 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. • For all 4.8L and 5.3L 1500 Series applications, the proper level is from 0.04 inch to 0.75 inch (1.0 mm to 19.0 mm) below the bottom of the filler plug hole, located on the rear axle. Add only enough fluid to reach the proper level. 5-52