1993 Buick Riviera Owner's Manual - Page 120
1993 Buick Riviera Manual
Page 120 highlights
your Bui& Comfort Control System This part tells you how to make your air system work :for you. you Fresh air from outside your vehicle flows through Buick when the car moving. When the vehicle is not is moving, you can get outside air to flow through by selecting anyair choice (exceptthe rear window defogger) and theHI fan speed. YourBuickhas.anElectronicTouchClimateControl, here's how' your system looks: Air Outlets Adjust the direction of air flow by moving the louvered vents.