Review on Oxygen Sensor 234-4087 Downstream O2 Sensor 2PCS for Buick Chevrolet Camaro Lumina S10 GMC Century Pontiac Montana Oldsmobile - Replaces 234-4087 13444 21528 SG277 12587214 by BoaTok by Andargie Waiker

Chevy Express 3500 6L 2006 Only one of the 2 in the kit will fit the connectors on the car (out of a possible 4). So they get 1/2 rating on everything. They are listed as ascending/descending. bla bla bla. Not at all against current for my car and only fits on one of the d/s plugs. Do yourself a favor by buying O2 sensors. Find the specific right model in AA, AZ, NAPA etc. then find the same model here. Pay a few dollars extra to get the right upstream/downstream, Bank1 and Bank2. It's a bit more work and a bit more expensive, but you're replacing tires more often than O2 sensors, so don't skimp on something that can last 10+ years.