1997 Chevrolet Blazer Owner's Manual - Page 325

c Trip/Highway LongDefinition Follow this maintenance schedule if none of the only conditions from the Short Trip/City Maintenance Schedule is true. Do not use this scheduleif the vehicle is used for trailertowing, 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 slowel: Maintenance Schedule I 1 Long Trip/Highway Intervals I Every 7,500 Miles (12500 km): Engine Oil and Filter Change (or every 12 months, whichever occurs first). Chassis Lubrication (or every12 months, whichever occurs first). Drive Axle Service. Tire Rotation. Every 30,000 Miles (50 000 km): Fuel Filter Replacement. Air CleanerFilter Replacement. Front Wheel Bearing Repack (2WD only).(orat eachbrake relining, whichever occursfirst). Every 50,000 Miles (83000 km): Automatic Transmission Service (severe conditions only). Every 60,000 Miles (100 000 km): Engine Accessory Drive Belt Inspection. FuelTank, Cap and Lines Inspection. Every 100,000 Miles (166 000 k ) Spark Plug Wire m: Inspection. Spark Plug Replacement. Positive Crankcase Ventilation (PCV) Valve Inspection. Every 150,000 Miles (240000 k ) Cooling System m: Service (or every 60 months, whichever occursfirst). These intervals only summarize maintenance services. Be sure to follow the complete maintenance schedule on thefollowing pages. I 7-6