Just wanted to send a big thank you to Phil for providing the community with his resources. I purchased a set of Syppo tow mirrors for my 2017 Sierra SLE, and Phil's DIY kit. Shipping from Phil was fast, instructions were straight forward. I started with the passenger side, took me about an hour or so from start to finish, then about 15 minutes on the driver's side. With his DIY kit, each door harness is required to be removed, then Phil's kit wired in and pinned in the door & mirror connection. I also installed the diodes for the bcm mod, that took about 30 seconds. Phil was quick to reply to a couple text messages I sent throughout the process to confirm the direction was going. I would not hesitate to work with him again in the future.