1998 Chevrolet Blazer Owner's Manual - Page 342

Maintenance Schedule I Short Trip/City Intervals Every 100,000 Miles (166 km): Spark Plug Wire 000 Inspection. Spark Plug Replacement. Positive Crankcase Ventilation (PCV) Valve Inspection. Every 150,000 Miles (240 km): Cooling System 000 Service (or every 60 months, whichever occurs first). These intervals only summarize maintenance services. Be sure to follow the complete maintenance schedule on the following pages. I Every 7,500 Miles (12 500 km): Engine Oil and Filter Change (or every 12 months, whichever occurs first). Chassis Lubrication (or every 12 months, whichever occurs first). Drive Axle Service. Tire Rotation. Every 15,000 Miles (25 000 km): Automatic Transmission Service (severe conditions only). Every 30,000 Miles (50 000 km): Fuel Filter Replacement. Air Cleaner Filter Replacement. Every 50,000 Miles (83 000 km): Automatic Transmission Service (normal conditions). Every 60,000 Miles (100 km): Engine 000 Accessory Drive Belt Inspection. Fuel Tank, Cap and Lines Inspection. Every 100,000 Miles (166000 km): Spark Plug Wire Inspection. Spark Plug Replacement. Positive Crankcase Ventilation (PCV) Valve Inspection. Every 150,000 Miles (240 000 km): Cooling System Service (or every 60 months, whichever occurs first). These intervals only summarize maintenance services. Be sure to follow the complete maintenance schedule on the following pages. Follow this maintenance scheduleonly if none of the conditions from the Short Trip/City Maintenance Schedule is true.Do not use this schedule if the vehicle is used for trailer towing, driven in a dusty area used or off paved roads. Use the Short Trip/City schedule for these conditions. Driving a vehicle with a fully warmed engine under highway conditions causes engine oil to break down slowez 7-6