1993 Chevrolet Lumina Owner's Manual - Page 271

ITEM NO. SERVICE 6 7 8 Camshaft Timing BeltInspection (3.4LCode X engine only)*-Inspect for cracks, wear oiliness. or Check tensioner for proper operation. See the service manual. (To purchase a service manual, see the Index under Service Publications.) Replace parts as needed. Cooling System Service*-Drain, flush and refill the system with new or approved recycledcoolant conforming to GM Specification 1825M. Keep coolant at theproper mixture as specified. See the Index under Coolant. This provides proper freeze protection, corrosion inhibitor level and engine operating temperature. Inspect hosesand replace if they are cracked, swollen or deteriorated. Tighten screw-type hose clamps. Cleanthe outsideof the radiator and air conditioning condenser. Wash the pressure cap and neck. To helpensure proper operation, we recommend a pressure test of boththe cooling systemand the pressure cap. Transaxle Service-For manual transaxles, fluid doesn't require changing. For automatic transaxles, change both the fluid and filter every 15,000miles (25 000 km)if the vehicle is mainly drivenunder one ormore of these conditions: ITEM NO. SERVICE In heavy city traffic where outside the temperature regularly reaches 90°F (32°C) or higher. In hilly or mountainous terrain. When doing frequent trailer towing. (With some models you shouldn't ever tow trailer. Seethe a Index under Towing a Trailer.) Uses such as found in taxi, police car or delivery service. If you do not use your vehicle under any of these conditions, change both the fluid and filter every 100,000 miles (160 000 km). 9 Spark PlugReplacement*-Replace spark plugs with the proper type. See Index under the Replacement Parts. 10 Spark Plug WireInspection*+Inspect for burns, cracks or other damage. Checkthe boot fit at thecoils and at the spark plugs. Replace wires as needed. 11 Positive Crankcase Ventilation System Inspection*-Inspect system for proper function. Replace anyworn, plugged or collapsed hoses or seals. Replace valve only necessary. if 269 .