The rear outboard head restraints can be removed if they interfere with the proper installation of the child restraint.
To remove the head restraint:

Warning
With head restraints that are not installed and adjusted properly, there is a greater chance that occupants will suffer a neck/ spinal injury in a crash. Do not drive until the head restraints for all occupants are installed and adjusted properly.
To reinstall the head restraint:

If necessary, press the height adjustment release button to further lower the head restraint.
See Head Restraints on page 3-2.
Securing a Child Restraint Designed for the LATCH System
Replacing LATCH System Parts After a CrashManaging the Vehicle Damage Repair Process
In the event that the vehicle requires damage repairs, GM recommends that you
take an active role in its repair. If you have a pre-determined repair facility
of choice, take the vehicle there, or have it towed there.
Specify to the facility that any required replacement collision parts be origi ...
Event Data Recorders
This vehicle is equipped with an event data recorder (EDR). The main purpose
of an EDR is to record, in certain crash or near crash-like situations, such as
an air bag deployment or hitting a road obstacle, data that will assist in understanding
how a vehicle’s systems performed. The EDR is de ...
Engine Air Cleaner/Filter
The engine air cleaner/filter is in the engine compartment on the driver side
of the vehicle. See Engine Compartment Overview on page 10-7 for more information
on location.
When to Inspect the Engine Air Cleaner/Filter
Inspect the air cleaner/filter at the scheduled maintenance intervals.
See ...