differential GMC SIERRA DENALI 2004 Owners Manual

Front Axle
When to Check Lubricant
It is not necessary to regularly check front axle ¯uid
unless you suspect there is a leak or you hear an
unusual noise. A ¯uid 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.
If the level is below the bottom of the ®ller plug hole,
you may need to add some lubricant.
When the differential is cold, add enough lubricant to
raise the level to 0 to 3/8 inch (9.5 mm) below the ®ller
plug hole.
When the differential is at operating temperature
(warm), add enough lubricant to raise the level to the
bottom of the ®ller plug hole.
What to Use
To determine what kind of lubricant to use, seeRecommended Fluids and Lubricants on page 6-13.
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