Hi there.
I literally just finished min today.
2017 Suburban LT.
Easy to do but time consuming.....Lots of bolts so I hope you have an electric or air ratchet.
I bought this...awesome kit...Low and High beams
https://auxito.com/products/9005-h11-led-headlight-bulbs-combo-12000lm-6000k-white-h8-h9-h11-hb3-9005-led-wireless-for-low-beam-and-high-beam-headlamp-bulbs?currency=USD&variant=38182664339608&utm_medium=cpc&utm_source=google&utm_campaign=Google Shopping&gclid=Cj0KCQjwkbuKBhDRARIsAALysV4_3ZlhOg4RjA-FZX29CC4Be1hCouk0-9l_BKB0pOEHDTc-0SU-qokaAnsAEALw_wcB
........and I followed these instructions:::: You need to take out the headlight assembly to get to the High Beams....
Seems like a daunting task...trust me its so easy
You can do it!!!!!