Four-Wheel Drive; Front Axle - GMC Yukon XL 2013 Owner's Manual

10-26 Vehicle Care

Four-Wheel Drive

Transfer Case
When to Check Lubricant
Refer to Maintenance Schedule on
page 11 2 to determine when to
check the lubricant.
How to Check Lubricant
Active Transfer Case
A. Fill Plug
B. Drain Plug
To get an accurate reading, the
vehicle should be on a level
surface.
If the level is below the bottom of
the fill plug (A) hole, some lubricant
will need to be added. Add enough
lubricant to raise the level to the
bottom of the fill plug (A) hole. Use
care not to overtighten the plug.
When to Change Lubricant
Refer to Maintenance Schedule on
page 11 2 to determine how often to
change the lubricant.
What to Use
Refer to Recommended Fluids and
Lubricants on page 11 11 to
determine what kind of lubricant
to use.

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.
1500 Series
A. Fill Plug
B. Drain Plug