Hummer 2009 H2 - Manual (Page 403)

How to Check Lubricant
A. Filler Plug
B. Drain Plug
1. Remove the filler plug (A). The fluid level should be
just below the bottom of the filler plug hole located
on the transfer case. To get an accurate reading,
the vehicle should be on a level surface.
2. Add fluid if necessary.
Refer to the Maintenance Schedule to determine
what kind of lubricant to use. See Recommended
Fluids and Lubricants on page 6-13.
3. Reinstall the filler plug. Use care not to overtighten
the filler plug.
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.
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