Cadillac 2007 SRX Owner's Manual page 86

A thick layer of additional material, such as a
blanket, or aftermarket equipment such as seat
covers, seat heaters, and seat massagers,
can affect how well the passenger sensing system
operates. Remove any additional material from
the seat cushion before reinstalling or securing the
child restraint and before a small occupant,
including a small adult, sits in the right front
passenger's seat. You may want to consider not
using seat covers or other aftermarket equipment.
86
See Adding Equipment to Your Airbag-Equipped
Vehicle on page 88 for more information about
modifications that can affect how the system
operates.
CAUTION:
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Stowing of articles under the passenger's
seat or between the passenger's seat
cushion and seatback may interfere with
the proper operation of the passenger
sensing system.