1994 Buick Regal Owner's Manual - Page 275

To help ensure proper operation, we recommend a pressure test of both the cooling system and the pressure cap. 6. Transaxle Service -- Change both the fluid and filter every 15,000 miles (25 000 km) if the vehicle is of mainly driven under one or more these conditions: 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 100,000 miles (1 60 000 km). 7. Spark Plug Replacement* -- Replace spark plugs with the proper type. See "Specifications Chart" in the Index. 8. 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. 9. Air Cleaner Filter Replacement* -- Replace every 30,000 miles (50 000 km) or more often under dusty conditions. Ask your dealer for the proper replacement intervals for your driving conditions. 10. Fuel Tank, Cap and Lines Inspection*? -- Inspect fuel tank, cap and lines (including fuel rails and injection assembly, if equipped) for damage leaks. or 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. * An Emission Control Service. The U.S. Environmental Protection Agency or the California Air Resources Board has determined that the failure to perform this maintenance item will not nullify the emission warranty or limit recall liability prior to the completion of vehicle useful life. General Motors, however,urges that all recommended maintenance services be performed at the intervals indicated and the maintenance be recorded in "Section E:Maintenance Record". s