Four-Wheel Drive - Chevrolet Silverado 2007 Owner's Manual

Four-Wheel Drive

Lubricant checks in this section also apply to
these vehicles.
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.
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How to Check Lubricant
Electric Shift Transfer Case
A. Fill Plug
B. Drain Plug