See also:

Passenger Sensing System
The vehicle has a passenger sensing system for the front outboard passenger position. The passenger airbag status indicator will light on the overhead console when the vehicle is started. ...

Footnotes — Maintenance Schedule Additional Required Services — Severe
a) Vehicles with different size front and rear tires do not have tire rotation. See Tire Rotation. b) Or every two years, whichever comes first. c) Check all fuel and vapor lines and hoses f ...

Add-on Electrical Equipment
The OnStar system is integrated into the electrical architecture of the vehicle. Do not add any electrical equipment. See Add-On Electrical Equipment. Added electrical equipment may interfer ...