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:
Tire Sealant
Read and follow the safe handling instructions on the label adhered to the sealant
canister.
Check the tire sealant expiration date on the sealant canister. The sealant canister
should be replace ...
Reactivation for Subsequent
Owners
Push and follow the prompts to
speak to an Advisor as soon as
possible after acquiring the vehicle.
The Advisor will update vehicle
records and will explain the OnStar
service offers and opt ...
Storing Button Memory Positions
To save positions into Button Memory:
1. Adjust the driver seat, seatback recliner, both outside mirrors, and
adjustable pedals, if available, to the desired driving positions.
2. Press and hold ...