Four-Wheel Drive - GMC TopKick 2007 Owner's Manual

Four-Wheel Drive

Transfer Case
When to Check Lubricant
It is not necessary to regularly check transfer case
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.
How to Check Lubricant
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, you'll need to add
some lubricant. 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 the Maintenance Schedule to determine
how often to change the lubricant. See Scheduled
Maintenance on page 363.
What to Use
Refer to the Maintenance Schedule to determine
what kind of lubricant to use. See Part C:
Recommended Fluids and Lubricants on page 397.
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