15284 Premium OE Fitment Oxygen Sensor - Compatible with Select Cadillac Escalade; Chevrolet Avalanche, Silverado, Suburban, Tahoe, Trailblazer EXT; GMC Envoy, Sierra, Yukon, + More

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.

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.

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.

Replaced my absolutely mangled downstream sensor on the Bank 1 of the '04 Escalade. Very firm and solid construction, nothing about this sensor feels cheap! Fully recommend it for any Downstream replacement. Had to buy a more pricey Delphi sensor for my Upstream, because this product isn't available for the Upstream on Amazon. Currently purchasing my 2nd sensor, as the OEM Bank 2 sensors have finally bit the bullet after 20 years. I have a good feeling these new sensors will last just as long.

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.

Fingers crossed still working

Part came in much different design but plugs were correct. Threaded in without any issue. Cranked engine, no check engine light, been driving for 2 weeks no and no issues. Great value so far

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