OnStar

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When to Add Engine Oil
3.9L V6 Engine 4.6L V8 Engine If the oil is below the cross-hatched area at the tip of the dipstick, add at least one quart/liter of the recommended oil. This section explains what kind of o ...

Service Parts Identification Label
This label, located either in the glove box or the trunk area, has the following information: ► Vehicle Identification Number (VIN). ► Model designation. ► Paint information. ...

Driving On Grades
Reduce speed and shift to a lower gear before you start down a long or steep downgrade. If you don’t shift down, you might have to use your brakes so much that they would get hot and no longer w ...