Chevrolet 1999 Tahoe Owner's Manual page 297

Your air cleaner is located between the battery and
coolant recovery tank.
To remove the air 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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