Engine Oil Additives/Engine Oil Flushes
Do not add anything to the oil. The recommended oils with the dexos specification and displaying the dexos certification mark are all that is needed for good performance and engine protection.
Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty.
See also:
Special Application Services
Severe Commercial Use Vehicles Only: Lubricate chassis components every
5 000 km/3,000 mi.
Have underbody flushing service performed once a year.
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Tires
Every new GM vehicle has
high-quality tires made by a
leading tire manufacturer. See
the warranty manual for
information regarding the tire
warranty and where to get
service. For additiona ...
Controls
The infotainment system is operated
by using the pushbuttons,
multifunction knobs, menus shown
on the display, and steering wheel
controls, if equipped. ...