GMC Sierra Owners Manual

Front Axle
Vehicle Care / Vehicle Checks / Front Axle

When to Check and Change Lubricant

It is not necessary to regularly check front axle fluid unless a leak is suspected, or an unusual noise is heard. A fluid loss could indicate a problem. Have it inspected and repaired.

How to Check Lubricant

To get an accurate reading, the vehicle should be on a level surface.

GMS Sierra: Front Axle. 1500 Series
1500 Series

A. Fill Plug
B. Drain Plug

GMS Sierra: Front Axle. All Except 1500 Series
All Except 1500 Series

A. Fill Plug
B. Drain Plug

Х When the differential is cold, add enough lubricant to raise the level from 0mm (0 in) to 3.2mm (1/8 in) below the fill plug hole.
Х When the differential is at operating temperature (warm), add enough lubricant to raise the level to the bottom of the fill plug hole.

What to Use

Refer to Recommended Fluids and Lubricants on page 11‑12 to determine what kind of lubricant to use.


© 2018 www.gmcmaster.com. All Rights Reserved.