I installed the Fast Headlights 35w Mini D2S projector upgrade on my 2019 Silverado 2500HD LT. Upgraded the low beam bulb to the Phillips Phillips XV2 Extreme Vision and high beam to Morimoto 2Stroke 2.0 LED. Very impressed, super bright and they were great to work with. I did mod the install through the dust cap using a cable gland. Essentially a pig tail with connectors on either side so I can completely remove the cap & pigtail to easily replace and reconnect the bulb. The gland is on the lower inside corner of each cap.