How to Replace the Oxygen Sensor in a GM Van
- 1). Locate your van's oxygen sensor. While the exact placement may vary depending on the year and model of your GM van, the oxygen sensor will always be located on the exhaust manifold near the catalytic converter. Single-sensor vehicles will have the oxygen sensor in front of (toward the engine) the catalytic converter, while two-sensor vehicles will have sensors both in front of and in back of the catalytic converter. The oxygen sensor will typically resemble a fat cylindrical peg with a cluster of wires coming out of the tip.
- 2). Disconnect the sensor's wiring from where it connects to your van's wiring harness. Take care when unplugging the wires that you do not accidentally damage the electrical connector, as doing so may cause your new oxygen sensor to not function properly.
- 3). Unscrew the oxygen sensor using your wrench or you ratchet and socket. Once you have successfully removed the sensor, you may discard it.
- 4). Coat the screw threads of your new oxygen sensor with a lubricating or penetrating compound. This is to ensure a smooth installation and will help prevent damage to the threads.
- 5). Install the new oxygen sensor into the exhaust manifold and reconnect the wires to the electrical socket mentioned in Step 2. Once this is done, your new oxygen sensor should be functioning correctly.