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:
Turn Signal/Multifunction Lever
The lever on the left side of the steering column
includes the following:
• Turn and Lane Change Signals
• Headlamp High/Low-Beam Changer
• Flash-to-Pass Feature
• Windshield Wipers
...
Service
For service and parts needs, visit your dealer/retailer.
You will receive genuine GM parts and GM-trained and
supported service people.
Genuine GM parts have one of these marks:
...
Check Gas Cap Light
If your vehicle has this
light, it will come on if
your gas cap is not
securely fastened. ...