1996 GMC Suburban Owner's Manual - Page 333

Maintenance Schedule I Long Wp/Highway D e f ~ t i o n-- Gasoline Engines Follow this maintenance schedule only if none of the conditions from the Short Trip/City Maintenance S'cheduleis true. Driving a vehicle with a fully warmed engine under highway conditions causes engine oilbreak to down slower: I Long 'IZipMighway Intervals -- Gasoline Engine 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. At 7,500 Miles (12 500 km) Then Every 15,000 Miles (25 000 km): Tire Rotation. Every 15,000 Miles (25 000 km):Shields and Underhood Insulation Inspection (GVWR above 8,500 lbs. only). Thermostatically Controlled Engine Cooling Fan Check (or every 12 months, whichever occurs first). .j 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). Every 60,000 Miles (100 000 km): Engine Accessory Drive Belt Inspection. Fuel Tank, Cap and Lines Inspection. ExhaustGas Recirculation System Inspection. Evaporative Control System Inspection. . Every 100,000 Miles (166 000 km):.Cooling System Service (or every60 months, whichever occurs first). Spark Plug Wire Inspection. Spark Plug Replacement. Positive Crankcase Ventilation (PCV) Valve Inspection. -- These intervals only summarize maintenance services. Be sure to follow complete maintenance schedule on the the following pages. I 7-5