Are there any 'issues' that are real gotchas with the 3.1L motor in the Gran Prix?
I remember someone saying something about a plastic intake manifold and coolant, but I don't know if that was referring to this motor or not.
My Gran Prix occasionally would show a high temp spike when I started it and first time of the day, but would otherwise be fine. Last week the car sat for 7 days, and when I drove it, the spike happened and it DIDN'T come down. It also had no heat, which never seemed to happen before either.
I think I caught it in time, but I won't have a chance to look at it for perhaps another 5 days.
Mike