2000 BUICK CENTURY spark plugs replace

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Page 306 of 344

BUICK CENTURY 2000  Owners Manual 6-64 Engine Specifications
Type 3100 V6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Displacement 191 CID. . . . . . . . . . . . . . . . . . . . . . . . 
Firing Order 1
-2-3-4-5-6 . .

Page 320 of 344

BUICK CENTURY 2000  Owners Manual Scheduled Maintenance
7-14
100,000 Miles (166 000 km)
Inspect spark plug wires.
 An Emission Control Service. 
Replace spark plugs.
 An Emission Control Service.
Change automatic transaxle fluid an