Used OEM GM Rear park Sensor removed from a new but damaged GM rear bumper - minor marks on the paint but they are nice. 

Number on the old sensor will ne one of the following: 84360391, 84510253; 84360381; 84360386; 84360388; 84360391; 84360392; 84360394; 84380285; 84380286; 84380288; 84380292; 84380293; 84389492; 84406193

Fits: 
2015-2019 Colorado, Canyon
2019-2023 Silverado or Sierra 1500
2020-2023 Silverado or Sierra 2500 / 3500
2019-2022 Blazer 
2019-2020 CT6
​​​​​​​2019 XT4, Camaro