NHTSA Complaint #10466278 — 2003 CADILLAC CTS

I PURCHASED THIS VEHICLE IN NOVEMBER 2011 WITH APPROX. 97,000 MILES SHOWING ON THE ODOMETER. DURING A THANKSGIVING HOLIDAY TRIP OF SOME 1600 MILES, CONSISTING MOSTLY OF HIGHWAY DRIVING WITH THE CRUISE CONTROL ENGAGED, AND FOR NO APPARENT REASON, THE ASC (AUTOMATIC STABILITY CONTROL) WOULD DISENGAGE THE CRUISE CONTROL, "TUG" THE VEHICLE TO THE LEFT OR RIGHT SLIGHTLY, SEEMED TO HAVE A SLIGHT BRAKING EFFECT (ALTHOUGH IT MAY HAVE BEEN THE SUDDEN DECELERATION THAT CAUSED THE SENSE OF BRAKING) AND WOULD DISPLAY " STABILITY CONTROL ENGAGED". THIS OCCURRED NUMEROUS TIMES. ALSO, ON THIS SAME TRIP, THE "TRACTION CONTROL" WOULD ENGAGE, WITHOUT WARNING OR NEED, AND DISENGAGE THE CRUISE CONTROL CAUSING SUDDEN, UNEXPECTED, DECELERATION. THIS TOO HAPPENED NUMEROUS TIMES. ALTHOUGH I DID NOTICE THAT THE "TRACTION CONTROL" SEEMED TO ENGAGE WHEN IN A CURVE ON ROUGH OR BUMPY ROADS. I CONCLUDED THAT THIS WAS THE RESULT OF A SUDDEN "WHEEL HOP" OR "SPIN" AS A RESULT OF LOSING TRACTION FROM THE "BOUNCE" WHEN HITTING A BUMP OR ROUGH SPOT. I'VE RUN THE "ONBOARD DIAGNOSTIC SYSTEM" SEVERAL TIMES AND NO CODES PERTAINING TO THESE EVENTS ARE DISPLAYED. *TR