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:
Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
• Signs that the headlamps need
attention include dimming, failure
to light, cracking, ...
Trunk Release
The trunk may be opened by
pressing on the Remote
Keyless Entry (RKE) transmitter or
the touch pad located on the rear of
the trunk above the license plate.
See Trunk for more
information. ...
Potential Issues
Some OnStar services are disabled
after five days. OnStar cannot
perform Remote Door Unlock or
Stolen Vehicle Assistance after the
vehicle has been off continuously
for five days. After five ...
