Lubricant Level Inspection - Rear Drive Axle (11.5 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 .
Make sure 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 and the seal.
Inspect the lubricant level.
Specification

The lubricant level should be between 0-10 mm (0-0.4 in) below the fill plug opening.

Fig 1: Rear Axle Fill Plug & Seal

Courtesy of GENERAL MOTORS CORP.

If the level is low, add 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 and gasket.
Tighten

Tighten the rear axle fill plug to 33 N.m (24 lb ft).
Lower the vehicle.