1994 Buick Skylark Owner's Manual - Page 267

Inspect hoses and replace they are cracked, if swollen or deteriorated. Tighten screw-type hose clamps. Cleanthe outside of the surge tank and air conditioning condenser. To help ensure proper operation, we recommend a pressure testof both the cooling system and the surge tank pressure cap. 6. Transaxle Service -- Change both the fluid and (25 filter every 15,000 miles 000 km) if the vehicle is mainly driven under one more of these or conditions: In heavy city traffic where the outside 90 temperature regularly reaches O F (32 O C) or higher. , , If you do not use your vehicle under any of these conditions, change both the fluid and every filter 100,000 miles ( 160 000 km). 7. Spark Plug Replacement" -- Replace spark plugs with the proper type. See "Specifications Chart" in the Index. 8. Spark Plug,WireInspection (3.1L Code M engfie only)*? -- Inspect for burns, cracks or other damage. Check the boot fit at the coils andat the spark plugs. Replace wiies as needed. 9. Air Cieariei- Filter Replacemeht" -- Replace every 30,000 miles (50 06b k ) more often under dusty m or conditions. Ask your dealer for proper the replacement intervalsfor your driving conditions. In hilly or mountainous terrain. When doing frequent trailer towing. With some models, you shouldn't ever tow a trailer. (See "Towing a Trailer" inthe Index.) Uses such as found in taxi, police car or delivery service. * 10.Fuel Tank, Cap. and Lines Inspection*? Inspect --. fuel tank, cap and lines (including fuel rails and injection assembly)for damage or leaks. Inspect fuel cap gasketfor an even filler neck imprint or any damage. Replace partsas needed. Periodic replacement of the fuel filter is not required. ~ 3- The U.S. Environmental An Emission Control Service. Protection Agency the California Air Resources.Bbard has determined that the failure perform this maintenance item will not nullify the or to of all emission warrantyor limit recall liability prior to the completion vehicle usefullife. General Motors, however, urges thatrecommended maintenance services be performed at the indicated intervals and the maintenance recorded in "Section ENaintenance Record". be