BOSCH 15284 Premium OE Fitment Oxygen Sensor - Compatible with Select 2003-06 Buick, Cadillac, Chevrolet, GMC, and Isuzu Cars, Trucks, and Suvs

There isn't much to say here- It's simple and works. 5/5 stars; Upon installation, it drastically improved mpg and caused check engine light + error codes to go away. You'll need 2x of these for the upstream. These do not work as downstream. Bosch is one of the better brands in my experience when it comes to O2 sensors and stuff like this in general (spark plugs, etc). It would likely work in any early 2000 5.3 LS, but that's just me eyeballing. Be sure to verify fitment before purchase.

04 Yukon 5.3 non flex fuel, sensor works, switches as it should, harness is the correct length, but the pcm doesn’t seem to like the rate of its switching, it doesn’t misfire and runs just fine but still has a check engine light on for that specific sensor and I don’t care to fix it the light doesn’t bother me that much.

Perfect fit for Bank 2 oxygen sensors on a 2004 Chevy Silverado

Fixed the bank 2 sensor 2 code on my 2004 Silverado with a 5.3. Kind of took me off guard when it looked different than the original.

Been great in my tahoe so far no codes

Replacement was not too hard. I watched a few YouTube videos first. It's not complicated. On my driveway, I drove the vehicle up on my oil change ramps to give me room to get underneath the vehicle. I blocked the tires and put jack stands in place, for safety. I followed the YouTube instructions to locate and disconnect the plastic connector plug. I used a large adjustable end wrench to loosen and remove the sensor from the exhaust pipe. This O2 sensor came with the anti-seize lubricant already applied. No need to buy any. It took me about an hour, but I work slowly.

Great

The O2 Sensor was delivered in a timely manner. It replaced a failed sensor on 2004 Chevy Tahoe (Bank 1/Sensor 1). I cleared the error code and it seems to have fixed my issue. To remove a 20 year old sensor took several days of PB Blaster and I used a O2 socket to fit over the wire to eventually get it to release. I would definitely recommend this O2 Sensor to replace a failed sensor.

Very good product OEM fitment and build quality, used to solve lean condition in bank 1 causing overfueling, whole bank 1 misfire, and horrible fuel economy. Problem was immediately fixed after replacing the sensor

Works no issues 3 months in

Great price and shipped quickly. My 2005 Yukon XL seemed to run much better immediately, although the transmission blew (within 2 blocks?!?) as I was going for a test run to see how the new oxygen sensor was working. Engine does sound much better though..... :)

Good quality and price. 2004 GMC sierra 5.3l Had a code P0420. Changed the l/h downstream O2 sensor and it's good to go. The sensor body is larger than the original but fits and works well.

work great