When doing replacement or upgrading on 2013 – 2018 Buick Encore capsule halogen headlamps with, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight2013 – 2016 H11
High Beam Headlight2013 – 2016 9005
Front Fog Light2013 – 2016 H8/H11/H16
Back Up Light2013 – 2016 921
Brake2013 – 2016 7443
Daytime Running Light2013 – 2016 H8/H11/H16
Dome Light2013 – 2016 578
Front Side Marker2013 – 2016 7444NA
Front Turn Signal2013 – 2016 7443NA
License Plate2013 – 2016 12961
Parking Light2013 – 2016 7444NA
Rear Turn Signal2013 – 2016 7440NA
Tail Light2013 – 2016 7443
Map Light2013 – 2016 12961
Low Beam Headlight2017 – 2018 H11
High Beam Headlight2017 – 2018 9005
Front Fog Light2017 – 2018 H8
Back Up Light2017 – 2018 921
Dome Light2017 – 2018 6411
License Plate2017 – 2018 194
Rear Turn Signal2017 – 2018 7440NA
Map Light2017 – 2018 12961