1993 Buick Riviera Owner's Manual - Page 279

TO BE SERVICED (See Explanationof Scheduled Maintenance Services Following Schedules I and 11) WHEN TO PERFORM Miles (kilometers) or Months, Whichever Occurs First I I MILES (000) , , 7.5 15 22.5 30 37.5 45 Item No. 8. Spark Plug Replacement* 9. Spark Plug Wire Inspection*T 10.Air Cleaner Filter Replacement* & 11. Fuel Tank, Cap Lines Inspection*? KILOMETERS (000) 0 0 Every 30 000 mi. (50 000 km) 0 0 I * The services shown in this schedule up to 45 000 miles (75000 km) shouldbe performed after 45 000 miles at the same intervals. An Emission Control Service. I T The U.S. Environmental Protection Agency has determined thatfailure to perform this maintenance item will not nullify the emission warranty recall liability prior the completionof the or limit to vehicle useful life. General Motors, however, urges all recommended maintenance services be performedthe indicated intervals and the maintenance be recorded that at in "Section E:Maintenance Record". 277