i see, thanks

in that case I'm also a 4 Orion, Michigan
2000 SLE

My 11th digit is a 4, so WTH?

1G4HP54K9Y4132942

Great to have. My wife used to work in Delta township (Lansing O , I think) before the layoff so I'm still interested in where things are made.

Interesting, 11th character in my VIN is 1, Wentzville Mo.

Is that even a Pontiac Plant?

4 = Orion. I remember touring that factory and there were LeSabres there.

There are no such things as "Buick" or "Pontiac" plants other than heritage (according to my lovely GM tour guide in Lansing). The line in Lansing had Grand Ams and Aleros on it and sometimes even a few others. The production process is fascinating. Odd, but fascinating. Technically, any Bonneville coming out of Orion Twp is (from heritage) a Buick.

Okay thanks.

Well, you got me there, but I guess I was asking more along the lines of if Bonnevilles, or H-bodies in general were produced there

then I would guess it to be true. I watched the Lansing factories very closely. Odd things would come out for short periods of time. We always thought it was a strictly Grand Am/ Alero factory until one day a Malibu came out, then a Monte Carlo /Lumina who knows-chevy-crap-car, even once we swore they were making a mini-van in there. So it is entirely possible that your Bonneville was produced in MO. Especially true if you have a transition model year when they would re-tool the home factory (i.e.1991, 1995, 1999, 2003). Oddly, GM even mixed in different body types in the same factory The Craft Center in lansing made Sunfires, Cavaliers, and El Dorados at the same time).
GM really needs to rethink its production strategy to stay afloat. Soooo much waste.