Question:
What is the difference between the LO54LR snd the LO54FR Meant to say LO54FR not LO54FL vs the LO54LR
asked by: Paul R
Helpful Expert Reply:
The correct set of Longview Custom Towing Mirrors for a 2020 GMC Sierra 1500 is part # LO54FR. These mirrors are a custom fit so they will slide right over the factory mirror housing which makes for the best look. They are easy to secure with only one fastener per side and there is a cutout for the turn signal. I have attached a photo below.
That said, I don't have any reference to the other part numbers you provided.
Longview Custom Towing Mirrors - Slip On - Driver and Passenger Side