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:
Other Navigation Services Available from OnStar
OnStar eNav: Allows subscribers to send destinations from Google Maps™ and MapQuest.com
to their Turn-by-Turn Navigation or screen-based navigation system. When ready,
the directions will be dow ...
Cargo & Towing
The Yukon Denali is a spacious three-row SUV for people, but that's it. If
there are six people and no cargo, the Yukon is a terrific place to be. If you
have a lot of cargo — you know, like lug ...
Airbag System Messages
SERVICE AIR BAG
This message displays if there is a problem with the airbag system.
Have your dealer inspect the system for problems. See Airbag Readiness Light on page 5‑20 and Airbag System ...





