A Bonneville SE is certainly not fancier than a Grand Prix GT. Cloth seats, no keyless entry, the same level DIC, the same engine. No HUD available, no SC available. That's one of the problems here--my Aurora has technology that isn't even on my wife's 2009 Cadlllac. Either car is a step down, but the Bonneville is more like two.
But I know I can trust the tranny.