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:
Removing the Spare Tire and Tools
To access the spare tire and tools:
1. Open the trunk. See Trunk .
2. Lift the load floor.
A. Retainer Nut
B. Tool Bag Tether
C. Tool Bag
D. Spare Tire
3. Turn the retainer nut (A) counter ...
Speedometer
The speedometer shows the vehicle's speed in either kilometers per hour (km/h)
or miles per hour (mph). ...
Retrieve My Number
1. Push . System responds:
“OnStar ready.”.
2. Say “My Number.” System
responds: “Your OnStar
Hands-Free Calling number is.” ...