Black plate (31,1)
GMC Sierra Owner Manual - 2011
Vehicle Care
10-31
Manual Shift Transfer Case
A. Fill Plug
B. Drain Plug
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 hole, located on the
transfer case, some lubricant will
need to be added. Add enough
lubricant to raise the level to the
bottom of the fill plug hole. Use care
not to overtighten the plug.
When to Change Lubricant
Refer to
Scheduled Maintenance on
page 11
‑
2
to determine how often
to change the lubricant.
What to Use
Refer to
Recommended Fluids and
Lubricants on page 11
‑
8
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.