Cargo Area Floor Drains; Top-Box Storage - Chevrolet 2004 Avalanche Owner's Manual

Cargo Area Floor Drains

Your vehicle also has four cargo-area floor drains
located under the cargo mat near the sides of the cargo
area. These drains should be cleaned periodically to
allow water to exit the cargo area.
The cargo mat has cutouts for the drains. You can flush
the drains through the cutouts, but if the cargo area
is extremely dirty you can lift up the edges of the cargo
floor mat or take the whole mat out and flush the
drains with water.
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Top-Box Storage

Your vehicle is equipped with top-box storage units on
both side of the vehicle. The passenger side top box
contains the tools you will need to change a flat tire.
Use the ignition/door key to unlock the top box if it is
locked. Press the key cylinder button and swing the lid
open. Turn on the cargo lamps (if equipped) if you
need more light inside the top boxes. See "Cargo
Lamps" under Exterior Lamps on page 3-14 for more
information on cargo lamps. Use the ignition/door key to
lock the top-box storage units.