Buick 2007 Rainier - Manual (Page 403)

How to Check Lubricant
To get an accurate reading, the vehicle should be
on a level surface.
The proper level is from 0 to 3/8 inch (0 to 10 mm)
below the bottom of the filler plug hole, located on
the rear axle.
What to Use
To determine what kind of lubricant to use, see
Recommended Fluids and Lubricants on page 489.
Front Axle
When to Check 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.
How to Check Lubricant
To get an accurate reading, the vehicle should be
on a level surface.
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