2011 Chevrolet Avalanche Owner's Manual - Page 129

Storage Midgate Drain Grate Removal and Cleaning Cargo Area Floor Drains 4-5 The removable Midgate drain grate is located near the base of the Midgate. After hauling dirt, wood chips, pebbles etc. the Midgate drain should be flushed with water. First remove the drain grate: 1. Lower the Midgate. See Midgate® on page 2‑9 for more information. 2. Pull up on the rear side of the drain grate, tilt it toward the front of the vehicle, and pull it out. Reverse the procedure to reinstall the drain grate. The cargo mat 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.