1997 GMC Sonoma Owner's Manual - Page 315

Maintenance Schedule I Short Trip/City Definition Follow the Short Trip/City Maintenance Schedule if any one of these conditionsis true foryour vehicle: Most trips are less than 5 to 10 miles (8 to 16 k ) m. This is particularly important when outside temperatures arebelow freezing. Most trips include extensive idling (such as frequent driving in stop-and-go traffic). 0 You operate your vehicle in dusty areas or off-road frequently. You frequently tow a trailer. If the vehicle is used for delivery service, police, taxi or othercommercial application. One of the reasonsyou should follow this schedulei f y o u operate your vehicle under any of these conditions is that these conditions cause engine oil break down soonex to I Short Trip/City Intervals Every 6,000 Miles (10 000 km): Tire Rotation. Every 15,000 Miles (25 000 km): Air Cleaner Filter Inspection, if driving in dusty conditions. Front Wheel Bearing Repack (2WD only) (or at each brake relining, whichever occurs first). Every 30,000 Miles (50 000 km): Air Cleaner Filter Replacement. Fuel Filter Replacement. 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. Every 100,000 Miles (166 000 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 j d l o w the complete maintenanceschedule on th.e.following pages. Short Trip/City Intervals Every 3,000 Miles (5 000 km): Engine Oil and Filter Change (or 3 months, whichever occursfirst). Chassis Lubrication (or 3 months, whichever occursfirst). Drive Axle Service (or 3 months, whichever occursfrst).