Chevrolet 2006 Avalanche Owner's Manual page 162

4. Remove the front rail by first twisting up the edge
nearest you, to clear the midgate seals, and then
pulling it out from the side rails.
2-88
5. Stow both bows and the front and rear rails in the
storage bag. When all components of the tonneau
cover are secured in the bag properly, zip the
bag shut.
Reverse the procedure to reinstall the tonneau cover
using the following suggestions:
•
When reinstalling the front rail, start by holding the
back edge of the rail up and then twisting the back
edge down while pushing it into place.
•
Both bows are the same size and therefore
interchangeable.