Front Axle - GMC 2007 Yukon XL Owner's Manual

When to Change Lubricant
Refer to the Maintenance Schedule to determine
how often to change the lubricant. See
Scheduled Maintenance on page 555.
What to Use
Refer to the Maintenance Schedule to determine
what kind of lubricant to use. See Recommended
Fluids and Lubricants on page 564.

Front Axle

When to Check and Change Lubricant
It is not necessary to regularly check front axle
fluid unless you suspect there is a leak or you hear
an unusual noise. A fluid loss could indicate a
problem. Have it inspected and repaired.
474
How to Check Lubricant
To get an accurate reading, the vehicle should be
on a level surface.
If the level is below the bottom of the filler plug
hole, located on the front axle, you may need
to add some lubricant:
•
When the differential is cold, add enough
lubricant to raise the level from 0 (0 mm)
to 1/8 inch (3.2 mm) below the filler plug hole.
•
When the differential is at operating
temperature (warm), add enough lubricant to
raise the level to the bottom of the filler
plug hole.