Yeah you'd probably have better luck here anyways.
The buick forum is still pretty new, but this place has an overwhelming amount of info for our cars.
I drive a 99 LeSabre, so while some differences, the mechanical stuff is pretty much the same.
SID E NOTE - When I was looking for a buick forum, most of them I found focused on the Grand National. Nice car and all, but not what I neded.
The Park Avenue is a C Body, and is a close kin to the H Body, Just a tad larger... Olds, Caddy and Buick all had the C body... The underpinnings are virtually the same... When you see a Park Ave, it will have the same drivetrain as the Bonneville... And that goes for the Park Ave Ultra as well... So stick with us as we should be able to help