Engine Oil Additives / Engine Oil Flushes
Do not add anything to the oil. The recommended oils with the starburst symbol that meet GM Standard GM6094M 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:
Safety Chains
Always attach chains between the vehicle and the trailer. Cross the safety chains
under the tongue of the trailer to help prevent the tongue from contacting the road
if it becomes separated from t ...
How OnStar Service Works
: This blue button connects you
to a specially
trained OnStar advisor to verify your account information
and to answer questions.
: Push this red emergency button to
get priority help
fro ...
Seat Cushion Tilt Feature
If available, move the lever up or down to raise or lower the front of the seat
cushion. ...