13 days later, our near apocalyptic ice storm is mainly melted. 1/4" of freezing rain followed by 3" of sleet, followed by nearly an inch of freezing rain, followed by 6" of heavy snow. Fortunately the last of the freezing rain was so hard that it actually "washed" off some ice from the trees instead of freezing even at 25 outside.
Caddy REALLY got it right when it comes to a passenger car that's great on dangerous roads! Unsalted areas got worse as daytime melting made them pure, solid ice and sunshine or above freezing temps would put a coat of liquid water on top.
The Seville is the oldest vehicle I own or regularly drove, but it was the best in these conditions. All have ABS, one other has traction control but no stability control.
The bottom of my driveway is steep and oddly pitched. No RWD vehicle has ever been able to get up it when extremely slick. After about five attempts, one guest made it about half way up only to have it slide back down into the street about an hour later! The Seville didn't even seem to spin a wheel--even over the pile left by the plow.
Many vehicles on the road were slipping and sliding--except for split seconds, the Seville went the EXACT direction I chose. For seconds at a time, I could hear the ABS/TC solenoids working furiously and rapidly learned how to tune my accelerator foot to the beat of the solenoids with just enough acceleration to get me up hills.
Instead of the herky-jerky action of the brake pedal and vehicle itself I usually feel when ABS is active in the others, the brake pedal would push firmly and continuously back at my foot even before I could react to the one slight skid I'd sometimes feel. (ABS is rarely active when I drive--even on bad roads as I long ago learned how to properly brake.)
For what I believe was the first stability system in a US car, it worked as well as in the 4-Runner I rented for use around Leadville, CO last winter with their record snowfall. Excepting ground clearance, the Seville seemed just as able.
It's hard NOT to become one with this car
While I haven't driven one, something tells me that the current model STS with RWD is a step down in this regard. It makes me glad that Cadillac dropped the Seville name altogether.
Growing up in Vermont I got to experience more than a few slippery situations. My STS is the best handling car, bar none, that I have ever driven in slop and bad weather. I have even tried to deliberately do stupid things with it (under controlled conditions) and have not found a way to get it out of control. Occasionally I have thought about leaving it home to keep it out of the bad weather, but then I realized that Stabilitrak does you no good in the garage.
) BFG Radial T/As. They have worn well and I haven't tried to go 140 with them 
