Set: Downstream & Upstream, 2pcs. FITMENT 1: 2PCS o2 sensor compatible with 2017 - 2020 Buick Envision 2.5L, 2019 Buick Lacrosse 2.5L, 2014 - 2017 Buick Regal 2.0L Turbocharged. for 2013 - 2015 Cadillac Ats 2.0L Turbocharged, 2013-2016 Cadillac Ats 2.5L, 2014 - 2015 Cadillac Cts 2.0L Turbocharged, 2016 - 2018 Cadillac Cts 6.2L Supercharged FITMENT 2: Set Oxygen sensor compatible with 2019 - 2021 Chevrolet Blazer 2.5L, 2016 - 2018 Chevrolet Camaro 6.2L, 2017 - 2018 Chevrolet Camaro 6.2L Supercharged, 2015 - 2018 Chevrolet Colorado 2.5L, 2014 - 2019 Chevrolet Impala 2.5L, 2013 - 2015 Chevrolet Malibu 2.0L Turbocharged/2.5L,2016 Chevrolet Malibu Limited 2.5L. for 2017 - 2021 Gmc Acadia 2.5L, 2015 - 2018 Gmc Canyon 2.5L QUALITY CONTROL: Manufactured according to OE original data, directly replace damaged parts. Note: if you are unable to confirm compatibility, use amzonconfirmedfit to confirm compatibility. Compatible vehicle
Please use amzonconfirmedfit to confirm compatibility.

Buick Vehicle Compatibility
For 2017 - 2020 Buick Envision 2.5L
For 2019 Buick Lacrosse 2.5L
For 2014 - 2017 Buick Regal 2.0L Turbocharged

Cadillac Vehicle Compatibility
For 2013 - 2015, 2017-2018 Cadillac Ats 2.0L Turbocharged
For 2013-2017 Cadillac Ats 2.5L
For 2014 - 2015, 2017 - 2018 Cadillac Cts 2.0L Turbocharged
For 2016 - 2018 Cadillac Cts 6.2L Supercharged

Chevrolet Vehicle Compatibility
For 2019 - 2021 Chevrolet Blazer 2.5L
For 2016 - 2018 Chevrolet Camaro 6.2L
For 2017 - 2018 Chevrolet Camaro 6.2L Supercharged
For 2015 - 2018 Chevrolet Colorado 2.5L
For 2014 - 2019 Chevrolet Impala 2.5L
For 2013 - 2015 Chevrolet Malibu 2.0L Turbocharged/2.5L
For 2016 Chevrolet Malibu Limited 2.5L

Gmc Vehicle Compatibility
For 2017 - 2021 Gmc Acadia 2.5L
For 2015 - 2018 Gmc Canyon 2.5L