4-2 Instruments and ControlsVehicle MessagesVehicle Messages . . . . . . . . . . . 4-36Battery Voltage and ChargingMessages . . . . . . . . . . . . . . . . . . 4-37Brake System Messages . . . . 4-38Compass Messages . . . . . . . . . 4-39Cruise Control Messages . . . . 4-39Door Ajar Messages . . . . . . . . . 4-39Engine Cooling SystemMessages . . . . . . . . . . . . . . . . . . 4-40Engine Oil Messages . . . . . . . . 4-40Engine Power Messages . . . . 4-41Fuel System Messages . . . . . . 4-42Key and Lock Messages . . . . . 4-42Lamp Messages . . . . . . . . . . . . . 4-44Object Detection SystemMessages . . . . . . . . . . . . . . . . . . 4-45Ride Control SystemMessages . . . . . . . . . . . . . . . . . . 4-45Airbag System Messages . . . . 4-48Anti-Theft Alarm SystemMessages . . . . . . . . . . . . . . . . . . 4-48Service Vehicle Messages . . . 4-48Tire Messages . . . . . . . . . . . . . . . 4-48Transmission Messages . . . . . 4-49Vehicle Speed Messages . . . . 4-50Washer Fluid Messages . . . . . 4-50Vehicle PersonalizationVehicle Personalization . . . . . . 4-51OnStar ® SystemOnStar ® System . . . . . . . . . . . . . 4-59Universal Remote SystemUniversal Remote System . . . 4-61Universal Remote SystemProgramming . . . . . . . . . . . . . . . 4-61Universal Remote SystemOperation . . . . . . . . . . . . . . . . . . 4-65