Buick 2004 Rendezvous Owner's Manual page 133

To adjust the crossrail(s), the sunroof stop (A) must be
removed.
To remove the sunroof stop, do the following:
1. Find the tool (B) located in a bag in the glovebox
labeled "tool kit-acsry".
2. Use the tool to remove the screw located in the
side rail assembly in front of the front crossrail.
3. Repeat for the other side.
4. Put the tool and the screws back in the plastic bag
in the glove box.
To adjust the crossrails, lift the release levers on each
side to unlock them. Slide the crossrails forward or
backward, as needed, to accommodate loads of
various sizes.
After repositioning the crossrails, push the release lever
down. This will lock the crossrails in place.
Notice: Opening the sunroof when the luggage
rack crossrails are not in the full-rear position could
cause damage to the sunroof or luggage rack.
Verify the luggage rack crossrails are in the full-rear
position before opening the sunroof.
When you are done using the crossrails you must
replace the sunroof stop.
To replace the sunroof stop, do the following:
1. Put the crossrails in the full rear position.
2. Using the tool, put the screws back into each side
rail assembly. Make sure the screws are in the first
hole in front of the crossrail.
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