I'm new to this forum. I recently purchased this 1997 SSE. It had a few previous owners. The last returned it to the car dealership she'd purchased it from after the radiator had gone. Unfortunately for her, She drove it there with no coolant circulating and ruined the engine. A mechanic from the dealership bought it from her. He replaced the engine with an 85K mile 3.8 out of another 97 Bonneville. He also replaced a number of other things (radiator, motor mounts, water pump, belts, etc.). I bought it to drive daily short distances, it seems to be a good car so far. It has 111K on the body.
I think these are good looking cars and I hope the 3.8 will be reliable.