1995 Buick Riviera Owner's Manual - Page 305

MaintenanceSchedule I1 60,000 Miles (100 000 km) I 0Drain, flush and refill cooling system (or every 24 months, 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 pressurecap. An Emission Control Service. 17 Change engine oil and filter (or every 12 months, whichever occursfirst). An Emission Control Service. 17 Lubricate the suspension and steering linkage, transaxle shift linkage, parlung brake cable guides and the underbody contact points andlinkage (or every 12 months, whichever occurs first). 0For supercharged engines only: Check the supercharger oil level and add oilas needed (or every 36 months, whichever occurs first). See "Recommended Fluids and Lubricants" in this section. An Emission Control Service. 0Replace spark plugs.An Emission Control Service. 0Inspect spark plug wires. Emission Control An Service. Service. 3- Replace air cleaner filter. Emission Control An 0Inspect engine accessory drive belt (or every 24 months, whichever occurs first). An Emission Control Service. 7-32