What's the 2002 Chevy silverado rear differential fluid type?

Differential oil is essential to lubricating the driveshaft and wheel axles in a vehicle. The 2002 Chevy Silverado as a heavy truck uses a gear oil with a viscosity of 75W-90. An 8.6 inch rear differential is equipped with 4.2 pints and the Silverado's 9.5 inch rear, useS5.5 pints. The differential casing can be found under the truck in the middle of the driveshaft. The cover is bolted on with twelve 10mm bolts and the plug can be opened using a 3/8" drive. Examine the plug for metal shavings from the gears. It's installed with a magnet. A clean plug is a good sign gears aren't worn down. You should schedule service for a gear oil change every 30,000-60,000 miles in the Silverado. Costs average $243-$300 in parts and professional labor.