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:

    INTERIOR
    While the Acadia Denali's upgraded exterior is apparent, the interior falls a little flat. It looks good, but it's not an up-to-date look. The instrument cluster was blah-looking and seemed outdat ...

    Online Owner Center
    Manage your vehicle (U.S.) at gmc.com. Click on “Owners,” then “Manage My GMC/Owners Login.” Information and services customized for your specific vehicle — all in one convenient place. ...

    Rear Window Lockout
    The rear window lockout feature prevents the rear passenger windows from operating, except from the driver position. Press to activate the rear window lockout switch. The LED light comes on when a ...