I say PEE-Khan.
Southern Michigan has a lot of southerners and its transformed our accents.
SW Pennsylvania is an interesting blend of cultures-- northeast elitists, southern redneck and calm midwesterners all meet here. Then you throw in the ethnics-- Slavs, Poles, Irish, Italian, Amish, German, Greek, Black and Dutch-- you get some of the finest eating (and biggest concentration of fat people) in the USA.
Tell me about it. I’m in Hazel Park. I think I’ll carry around a bag of pecans today and ask folks how to pronounce it. I’ll either get my answer, or get punched out.
For a while I worked in the Pleasant Grove area of Dallas (which is very much like Hazel Park). There was a part of that called “Pecan Heights” which at one time was a city. I was the source of a lot of amusement when I tried to pronounce it.
I also learned the correct pronunciation of the local street called St. Augustine. Apparently they pronounce it AWW Gust Teen there.