1993 Buick Regal Owner's Manual - Page 277

conditioning condenser. Wash the pressure capand neck. 8. Spark Plug Replacement* To help ensure proper operation, we recommend a pressure test of both the cooling system and the pressure cap. Replace spark plugs with the proper type. See "Specifications Chart" in the Index. -- 7. Transaxle Service -- Change both the fluid and filter every 15,000 miles (25 000 km) if the vehicle is mainly driven under one or more these of conditions: 0 9. Spark Plug Wire Inspection"? -- Inspect for burns, cracks or other damage. Check the boot fit at the distributor and at the spark plugs. Replace wires as needed. 10. Air Cleaner Filter Replacement* -- Replace every 30,000 miles (50 000 km) ormore often under dusty conditions. Ask your dealer for the proper replacement intervals for your driving conditions. 11 Fuel Tank, Cap and Lines Inspection"? -- Inspect fuel tank, cap and lines (including fuel rails and injection assembly, if equipped) for damage or leaks. Inspect fuel cap gasket for an even filler neck imprint or any damage. Replace parts as needed. Periodic replacement of the fuel filter is not required. In heavy city traffic where the outside temperature regularly reaches 90 F (32 C) or higher. In hilly or mountainous terrain. When doing frequent trailer towing. Uses such as found in taxi, police car or delivery service. . If you do not use your vehicle under any of these conditions, changeboth the fluid and filter every 100,000miles ( 160 000 km). 275