1997 Oldsmobile Silhouette Owner's Manual - Page 398

Long TripEIighway Maintenance Schedule 100,000 Miles (I 66 000 km) (Continued) - In hilly or mountainous terrain. - 150,000 Miles (240 000 km) 0Drain, 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 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. I f you do not use pour vehicle under any o f these corzditions, the- fluid filter do not and require clznrzgirzg. DATE ACTUAL MILEAGE SERVICED B Y I DATE ACTUAL MILEAGE SERVICED BY: 7-36