GMC Chevrolet Tahoe 2003 Manual page 400

How to Inspect
Locate the filter change indicator. When the change
indicator turns black or is in the red/orange "change"
zone, replace the filter and reset the indicator. To
inspect the air cleaner/filter, remove the filter from the
vehicle and lightly shake filter to release loose dust and
dirt. If the filter remains "caked" with dirt, a new filter
is required.
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To inspect and replace the filter and reset the indicator
(if equipped), do the following:
The air cleaner/filter assembly is located on the front
corner of the engine compartment on the passenger's
side of the vehicle.