GMC 2003 Yukon Denali User Manual page 307

The service window (A)
with the percentage scale
shows the amount of
engine air cleaner/filter life
used.
I
I
When both service window (A) and service window (B)
turn orange, replace the engine air cleanedfilter.
After changing the engine air cleaner/filter, press the
button on top of the air filter restriction indicator to
reset it.
Your engine air cleaner/filter is located in the air filter
housing near the front corner of the engine compartment
on the passenger's side of the vehicle. See Engine
Compartment Overview on page 5-12 for more
information on location.
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