1994 Buick Roadmaster Owner's Manual - Page 294

8. Spark Plug Replacement* -- Replace spark plugs with the proper type. See "SpecificationsChart" in the Index. 9. Spark Plug Wire inspection*^ -- Inspect for burns, cracks or other damage. Check the boot fit at the distributor and at thespark plugs. Replace wires as needed. 10.Air Cleaner Filter Replacement* -- Replace every 30,000 rniles (50 000 km) or more often under dusty conditions. Ask your dealerfor the proper replacement intervalsfor your driving conditions. 11. Fuel Tank, Capand Lines Inspection*? -- Inspect fuel tank, cap and lines (including injection assembly) for damage or leaks. Inspect fuel cap O-ring for any damage. Replace parts as needed. Periodic replacementof the fuel filter is required. not 12. Rear Axle Fluid Change -- If your vehicle is used to pull a trailer, have the rear axle gear lubricant changed every 7,500 miles (12 500 km). If your vehicle is not used to pull a trailer, but has a limited-slip differential, have the rear axle gear 7,500 lubricant changed once, after the first miles (12 500 km). * An Emission Control Service. t The U.S. Environmental Protection Agency the California Air Resources has determined that the to performthis maintenance item will not nullify the or Board failure to that services be emission warrantyor limit recall liability prior the completionof vehicle useful life. General Motors, however, urgesall recommended maintenance performed at the indicated intervals and maintenance be recorded in "Section E:Maintenance Record". the 292