Oxygen sensor location on 2003 Pontiac grand prix?

The 2003 Pontiac Grand Prix has four oxygen sensors. Two are located in the exhaust manifolds, and two are located in the catalytic converters.

To replace the oxygen sensors in the exhaust manifolds:

1. Disconnect the negative battery cable.

2. Remove the oxygen sensor from the exhaust manifold using a wrench.

3. Install a new oxygen sensor into the exhaust manifold.

4. Connect the negative battery cable.

To replace the oxygen sensors in the catalytic converters:

1. Disconnect the negative battery cable.

2. Remove the oxygen sensor from the catalytic converter using a wrench.

3. Install a new oxygen sensor into the catalytic converter.

4. Connect the negative battery cable.