Buick 2010 Lucerne Owner's Manual page 416

Fuses
Engine Control Module (ECM),
1
Crank
2 Fuel Injectors Odd
3 Fuel Injectors Even
4 Air Conditioning Clutch
6-110
Usage Fuses
5 Air Injection Reactor (AIR) Solenoid
6 Oxygen Sensor
7 Emission Device
8 Transmission, Ignition 1
Usage