Chevrolet 2002 Tahoe Owner's Manual page 230

The following steps must be performed on each of the
-
push pins to remove the air dam:
1. Insert a tool into the
-
push pin slot and pull
downward until the
-
push pin snaps loose.
2. While continuing to pull
downward on the
-
push pin, squeeze and
turn the expandable end
-
of the push pin with a
tool until it releases
from the retainer.
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