1997 Buick Park Avenue Owner's Manual - Page 382

100,000 Miles (166 000 km) (Continued) - 150,000 Miles (240 000 km) 0Drain, flush and refill cooling system (or every60 months since last service, whichever occurs first). See "Engine Coolant'' in the Indexfor what to use. Inspect hoses. Clean radiator, condenser, pressure cap and neck. Pressure test the cooling system and pressure cap. An Emission Control Service. When doing frequent trailer towing. - Uses such as found in taxi, police or delivery service. lf you donot use your vehicle under any of these conditions, the fluid and filter do not require changing. DATE MILEAGE ACTUAL SERVICED BY DATEMILEAGE ACTUAL I I r SERVICED B Y