No these do not need any trimming of your existing studs. These were purchased from Custom Wheel Offset. They sell for $120/pair, I’m selling all 4 for $110.
https://www.customwheeloffset.com/store/spacers/21213/pair-of-aluminum-0375in-bora-spacers
I have (4) new 3/8 Bora Wheel Spacers. Will accept $110 shipped for them and will ship USPS Priority Mail. Please private message or post if you would like to purchase -
I am unsure if these can be sold on here, if not - please delete and my apologies. $430 shipped each. Will be shipped Via USPS priority.
You can check out my eBay feedback under the same name “bad_gmc”. Their fees are too high.
These are brand new, unused - $150 shipped for 4 or $280 shipped for all 8. I accept PayPal. Will ship via USPS Priority.
https://www.customwheeloffset.com/store/spacers/4715/3-8-bora-spacers-set-4-for-5-lug-and-6-lug-applications-one-piece
I don't have any on my truck, but the set in my garage are these...
https://accessories.gmc.com/product/exterior/crew-cab-short-bed-6-inch-rectangular-wheel-to-wheel-assist-steps-in-black-84126245?vin=3GTU9BED2LG141604&categoryId=12002
I just opted to not have them install them when I bought the truck. They are brand new in box.
Yes, unless he needs the brackets themselves.
I would recommend just stopping at your local GM Dealership to see if they have them brackets/bolts available separately.