2010 Chevrolet Avalanche Owner's Manual - Page 205

Cargo Area Floor Drains Top-Box Storage The cargo net has cut outs for the four cargo-area floor drains located under the cargo mat near the sides of the cargo area. Periodically flush the drains through the cut outs to clear debris and allow water to drain from the cargo area. If the cargo area is extremely dirty lift up the edges of the cargo floor mat or take the whole mat out and flush the drains with water. The vehicle has top-box storage units on both sides of the vehicle. The passenger side top box contains the tools needed to change a flat tire. Use the key to unlock or lock it. Press the key cylinder button and swing the lid open. Turn on the cargo lamps, if the vehicle has them, to light the inside of the cargo area. See Exterior Cargo Lamps on page 4‑13 for more information. 3-91