1997 Buick Century Owner's Manual - Page 356

1 Short TripKity Maintenance Schedule - When doing frequent trailer towing. - 1 150,000 Miles (240 000 km) Drain, flush and refill cooling system (or every 60 months since last service, whichever occurs first). See "Engine Coolant" in the Index for what to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test cooling system and pressure cap. An Emission Control Sewice. 100,000 Miles (166 000 km) (Continued) Uses such as found in taxi, police or delivery service. I f you do not use your vehicle under any of these conditions, the fluid and filter do not require changing. DATE ACTUAL MILEAGE SERVICED BY: DATE SERVICED ACTUAL MILEAGE BY: 7-26