Honestly, I haven't even seen those 17 x 9s yet. I keep forgetting to ask him the name of the business that did it. The wheels look like wide GM wheels that are 17", 1/2" bigger diameter than what was seen on these trucks through the years. People ask if my 16s are 16.5s. They are all so close in size.
I did this with 16 x 10s on a '91 Suburban. I have considered buying 8", paint rallye wheel color, chrome 88-98 center caps, with trim rings on my '95 Suburban for a factory sport wheel look.
Here are widened 88-98 wheels to 8"