Chevrolet 2006 Avalanche Owner's Manual page 155

Maintenance and Cleaning
To ensure that the water management system performs
properly, be sure that the midgate, tailgate, and cover
system are fully closed and that each part of the
water management system is clean and not blocked
with debris. Follow the instruction given next in
this section for the proper procedures on cleaning each
part of the water management system.
Top Drain Grates – Removal and
Cleaning
The top drain grates are located near the rear glass on
both sides of the vehicle. You may need to clean the
grates and drains if there seems to be a blockage.
To remove each drain grate, do the following:
1. Remove the cargo panels or tonneau cover. See
Cargo Cover Panels on page 2-65 or Tonneau
Cover on page 2-83 for more information.
2. Grasp the edges of the grate and pull it out from
the vehicle. Flush the drain with clean water.
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