Hummer 2007 H2 Owner's Manual page 163

Crossrail Channels
Notice: If you drive your vehicle through an
automatic car wash that does not have enough
clearance for any roof-mounted accessories
(such as off-road lamps or a roof basket)
on your vehicle, you can damage your vehicle.
To avoid damaging your vehicle in a car
wash, remove any roof-mounted accessories if
you can, and do not use an automatic car
wash while roof-mounted accessories are on
your vehicle. See Washing Your Vehicle
on page 495 for more information.
The crossrails have built in channels to allow you
to attach other items designed for this system,
such as basket luggage carriers, bike racks,
ski racks, etc.
To use the crossrail channels, do the following:
1. Use the included key to unlock the crossrail
end cap by turning it counterclockwise. If you
ever lose a key, your dealer will be able to
help you obtain a replacement.
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