Lubricant Level Inspection - Rear Drive Axle (9.75 Inch Axle)

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Raise the vehicle. Refer to JACKING AND LIFTING .
Ensure the vehicle is level.
Inspect the rear axle for leaks. Repair as necessary.
Clean the area around the rear axle fill plug.
Remove the rear axle fill plug.
Inspect the lubricant level.
Specification

The lubricant level should be between 0-4 mm (0-0.16 in) below the fill plug opening.

Fig 1: Rear Axle Fill Plug

Courtesy of GENERAL MOTORS CORP.

If the level is low, ad lubricant until the level is even with the bottom edge of the fill plug opening. Use the proper fluid.
NOTE: Refer to FASTENER NOTICE .
Install the rear axle fill plug.
Tighten

Tighten the rear axle fill plug to 21 N.m (15 lb ft).
Lower the vehicle.