KNOWN TRANSMISSION ISSUE WHICH CAUSES THE VEHICLE TO TO BUCK AND SURGE WHEN YOU PULL UP TO TA STOP LIGHT, STOP SIGN, ON HIGHWAY,OR IN TRAFFIC. EXTREMELY DANGEROUS. DEALER STATES THAT THIS IS A KNOWN CONDITION WITH NO FIX. DEALER DESCRIBES ISSUES WITH SOME VEHICLES WORSE THAN OTHERS. GENERAL MANAGER OF COLONIAL CADILLAC WOBURN MA 781-935-7000 (BRET DOUGLAS) STATES THAT HE HAS DRIVEN VEHICLES WITH SAME ISSUES AND THERE IS NO FIX. IT WAS CORRECTED IN THE 2018 VEHICLES BY GOING TO A 10 SPEED TRANSMISSION. OUR VEHICLE HAS BEEN IN FOR SERVICE MULTIPLE TIMES WITHOUT ANY SUCCESS IN A REPAIR. WE ARE AFRAID TO DRIVE THE VEHICLE AS IT SURGES FORWARD AT ANY GIVEN MOMENT. CONTACTED CADILLAC AND THEY ARE UNWILLING TO DO ANYTHING TO HELP WITH THE ISSUE. THEY ARE CONCERNED THAT THIS WOULD START THEM DOWN A SLIPPERY SLOPE FOR REPAIRING MANY 2015,16,17'S THAT HAVE THE SAME ISSUE. YOU ONLY HAVE TO GOOGLE THE ISSUE TO SEE THAT MANY GM OWNERS ARE DEALING WITH THIS SAME ISSUE. THIS IS A SAFETY ISSUE THAT NEEDS TO HAVE A RESOLUTION. SOMEONE IS GOING TO GET SERIOUSLY INJURED OR KILLED AS A RESULT OF THIS TRANSMISSION ISSUE. PLEASE HELP