Where are the 2007 buick lucerne v8 oxygen sensors located?

The oxygen sensors on a 2007 Buick Lucerne with a V8 engine are located in two primary locations: the upstream (pre-catalytic converter) sensors are positioned on the exhaust manifolds or near the front of the exhaust pipes, while the downstream (post-catalytic converter) sensors are located further along the exhaust system, after the catalytic converters. Typically, there are two upstream and two downstream sensors. Accessing them may require lifting the vehicle and removing some components for better visibility.