Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
For the 9.5 inch and the 10.5 inch axles, remove the rear axle fill plug.

Fig 1: View Of Rear Axle Fill Plug

Courtesy of GENERAL MOTORS CORP.

For the 11.5 inch axle, remove the fill plug.

Fig 2: Removing Rear Axle Fill Plug (11.5 Inch Axles)

Courtesy of GENERAL MOTORS CORP.

Remove the rear axle drain plug.

Fig 3: Removing Rear Axle Drain Plug

Courtesy of GENERAL MOTORS CORP.

Drain the lubricant into a suitable container.
Inspect the drain plug for excessive metal particle accumulation. This accumulation is symptomatic of extreme wear.
Clean the drain plug.