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If that fuse is okay. try giving the wiper motor a jolt by whacking it end on with a broom handle. Can you hear the wiper motor running? Check the linkages.
There are four O2 sensors on your vehicle. Two for each bank of the engine. There will be one between the exhaust manifold and the catalytic converter and one near the end or just after the catalytic converter for each bank. If you are receiving a DTC indicating a sensor is bad, you need to see which sensor the code indicates. It will say something like bank 2 sensor 1.
Based upon the design the of replacement part, it appears that it would be bolted to the transmission bell housing at one side of the engine adjacent to the flywheel where it can sense the flywheel teeth passing the sensor head.
I believe that the 2006 Buick (if it is a U.S. version) is required to have a vacuum routing diagram posted at the engine (usually on top of the fan shroud). Check there.
Sensor A is going to be one on the exhaust pipe close to the engine. Sensor B is behind (or in) the catalytic converter. Now we need to know if it is on bank 1 or bank 2... you can get them off with s 13/16 socket or wrench.
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