1998 GMC Suburban Owner's Manual - Page 371

Maintenance Schedule LLong Tripmighway Intervals -- Gasoline Engines I I Long TridHkhwav Intervals -- Gasoline Engines I Every 60,000 Miles (100 000 km): Engine Accessory Drive Belt Inspection. Fuel Tank, Cap and Lines Inspection. Exhaust Gas Recirculation System Inspection. Evaporative Control System Inspection. Every 100,000 Miles (166 000 km): Spark Plug Wire Inspection. Spark Plug Re.placement. Automatic Transmission Service (normal conditions). Positive Crankcase Ventilation (PCV) Valve Inspection. Every 150,000 Miles (240 000 km): Cooling System Service (orevery 60 months, whichever occurs first). These intervals only summarize maintenance services. Be sure to follow the complete maintenance schedule on the following pages. Every 7,500 Miles (12 500 km): Engine Oil andFilter Change (or every 12 months, whichever occurs first). Chassis Lubrication (orevery 12 months, whichever occurs first). Drive Axle Service. Tire Rotation. Every 15,000 Miles (25 000 km): Shields and Underhood Insulation Inspection (GVWR above 8,500 lbs. only). Every 30,000 Miles (50 000 km): Fuel Filter Replacement. Front Wheel Bearing Repack (2WD only) (or at each brake relining, whichever occurs first). Every 50,000 Miles (83 000 km): Automatic Transmission Service (severe conditions only). 7-7