Much like a finely tuned athlete needs oxygen to perform at his highest level, your GMC Yukon, another finely tuned machine, also needs the right amount of oxygen to maintain a high level of performance. In the engine of your GMC Yukon, your GMC Yukon Oxygen Sensor measures the oxygen content in the exhaust to get an accurate reading to send to your Yukon's computer. This is not such an easy job when you consider that these measurements are taken hundreds of times every minute from the blazing hot exhaust right out of the cylinders.

But this is vital information needed to get the air to fuel ratio right. When the oxygen sensor is working properly and the ratio is correct, your Yukon will be running smooth and powerful, like it was designed to run. But when the oxygen sensor in your GMC Yukon begins to show signs of wear, there are some tell tale signs.

These signs might include a sulfur or "rotten egg" smell from your engine, black smoke from your exhaust, or a rough idle. The fuel mileage and engine performance of your Yukon will also suffer. Your Yukon, once powerful, may now seem sluggish and weak. On top of all that, you will have a tough time passing any emissions tests due to the black cloud of wasted fuel you'll be spewing into the air.But don't despair, when you notice any of these symptoms, you can bring back the powerful, clean running Yukon with a new oxygen sensor! Maintain the power and prestige of your Yukon with a GMC Yukon Oxygen Sensor and leave the black cloud behind!