See also:

How to Add Automatic TransmissionFluid
Refer to the Maintenance Schedule to determine what kind of transmission fluid to use. Add fluid only after checking the transmission fluid while it is hot. A cold check is used only as a referenc ...

If the Off Indicator Is Lit for an Adult-Size Occupant
If a person of adult-size is sitting in the front outboard passenger seat, but the off indicator is lit, it could be because that person is not sitting properly in the seat. Use the follow ...

How OnStar® Service Works
In order to provide you with OnStar® services, your vehicle’s OnStar® system has the capability of recording and transmitting vehicle information. This information is automatically sent to an ...