NHTSA Complaint #11355687 — 2017 CHEVROLET SILVERADO 2500

II TOOK MY 2017 1500 SILVERADO I PURCHASED 11/2020 THAT HAD ABOUT 9500 MILES TO THE CHEVY SERVICE CENTER AND STATED WHILE DRIVING MY VEHICLE WHEN COMING TO A STOP DURING THE 2-1 DOWNSHIFTING OF THE TRANSMISSION A VERY LOUD CLUNKING NOISE AND AT THE SAME TIME IT FEELS LIKE SOMETHING HIT THE REAR OF THE VEHICLE. UPON STARTING FROM A STOP SIGN OR STOP LIGHT THE 1-2 SHIFTING OF THE TRANSMISSION MAKES THE SAME LOUD CLUCKING NOISE AND IT FEELS LIKE SOMETHING HIT THE VEHICLE WAS IN THE REAR AGAIN. THE CHEVY SERVICE PERSON STATED THAT IN THE VEHICLES HISTORY, THE PRIOR OWNER HAD THE FACTORY UPDATE AND REPROGRAM THE TRANSMISSION TO TRY TO CORRECT MY CURRENT ISSUES. I THEN LEFT THE DEALERSHIP WITH THE SAME ISSUES PRIOR TO MY VISIT. ON 7/21/2020 I WAS HAVING MY VEHICLE SERVICED FOR A FACTORY RECALL FOR THE REAR WIDOW DEFROST. I STATED AGAIN TO THE CHEVY SERVICE ABOUT MY CONTINUED TRANSMISSION DRIVELINE CLUNKING ISSUES. ACCORDING TO MY SERVICE PAPERWORK THE SEVICE TECH STATED THE TRANSMISSION IS OPERATING AS NORMAL, BUT ATTACHED TO MY SERVICE PAPERWORK STATING BULLETIN #PIT5161G NORMAL CHARACTERISTIC-BUMP FEEL OR CLUNK NOISE AFTER A STOP {AFFECTING GMC CHEVY YEARS 2007-2020 AND ALSO UP DATED # BULLETIN #99-04-002K INFORMATION ON DRIVELINE CLUNK {OCT 29 2019}. TO DATE 9/17/2020 I AM STILL HAVING THE SAME DRIVING ISSUES.