The part you're referring to- the Lippert Replacement Atlas Jack for Kwikee Level Best Hydraulic Leveling System - 17,000 lbs # LC359275 - is not the complete Level Best kit. Part # LC359275 is only the hydraulic Atlas jack from the system. view full answer...
The Draw-Tite Hitch # 75528, which is a confirmed fit for your 2015 Buick Enclave, does come with the hardware needed for installation; it is a complete bolt-on installation that does come with bolts. I have added a link to a video of this hitch being installed on a '15 Enclave for you to take a look at.
As for wiring, "regular" wiring would not work; for an aftermarket harness to work on this particular vehicle you would need to have the factory tow package to use T-One Vehicle Wiring... view full answer...
The picture for the Replacement Hardware Kit, part # RHK, is a typical photo. This means the picture is not the exact parts you will get with the kit you will need, it is just a photo of typical hitch mounting hardware.
When you order your # RHK hardware kit, you will need to put in the part number of your hitch and the manufacturer of your hitch. With that information we will send you the same hardware that you would have received when you would have initially purchased that particular... view full answer...