1998 GMC Suburban Owner's Manual - Page 370

1998 GMC Suburban Manual

Page 370 highlights

Maintenance Schedule I Short Trip/City Intervals -- GasolineEngines Every 100,000 Miles (166 000 km): Spark Plug Wire Inspection. Spark Plug Replacement. 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). I ng Tkiphlighway Definition -- Gasoline Engines I Follow this maintenance schedule only 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 or used off paved roads. Use the Short Trip/City schedule for these conditions. 7-6

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