Chevrolet 2006 Avalanche Owner's Manual page 155

Midgate Drain Grate Removal and
Cleaning
The midgate drain grate is located near the base of the
midgate in the cargo area. You will find a removable
drain grate covering the drain.
After hauling dirt, wood chips, pebbles etc. you will need
to flush the midgate drain with water. But first you will
have to remove the drain grate by using the following
steps:
1. Lower the midgate. See Midgate
more information.
2. Pull up on the rear side of the drain grate.
3. Tilt the drain grate away from you and pull it
straight out.
Reverse the procedure to reinstall the drain grate.
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on page 2-11 for
2-81