Cadillac 2000 Escalade Manual page 278

To remove the engine air cleaner/filter:
1. Unhook the retainer clips and remove the cover.
2. Lift the filter and the connected duct out of the air
cleaner housing. Hold the duct and remove the filter
by both pulling and twisting the filter away from the
duct. Care should be taken to dislodge as little dirt
as possible.
3. Clean the filter sealing surface of the duct and the
filter housing.
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4. Install the new filter by pushing it all the way to the
stop on the duct.
5. Install the duct and the filter into the air cleaner
housing. Make sure that the duct fits properly into
the housing.
6. Install the cover and fasten the two retaining clips.
7. After the filter is properly serviced, the indicator
should be reset. Push the button on top of the
indicator to reset it to the green (clean) filter zone.