Chevrolet 2001 Express Van Owner's Manual page 286

The engine air cleaner/filter is located near the center
of the engine compartment. See "Engine
Compartment Overview" in the Index for more
information on location.
To change the engine air cleaner/filter, do the following:
1. Unhook the retainer clips and remove the cover.
2. Lift the filter out of the engine air cleaner/filter
housing. Care should be taken to dislodge as little
dirt as possible.
3. Clean the engine air cleaner/filter housing.
4. Install the new engine air cleaner/filter into the
engine air cleaner/filter housing. Make sure that it
fits properly into the housing.
5. Install the cover and fasten the retaining clips.
6. After the engine air cleaner/filter is properly
serviced, the indicator should be reset. Push the
button on the top of the indicator to reset it to the
green (clean) filter zone.
See "Normal Replacement Parts" for the proper filter
to use.
Refer to the Maintenance Schedule to determine when to
replace the engine air cleaner/filter and crankcase
ventilation filter. See "Scheduled Maintenance Services"
in the Index.
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