NHTSA Complaint #10908562 — 2016 CHEVROLET COLORADO

2,400 MILES AND THIS VEHICLE HAS BEEN BACK TO THE DEALER FOUR TIMES FOR "CHUGGING AND SHUTTERING" IN HEAVY TRAFFIC. DRIVING THOUGH AN INTERSECTION WITH HEAVY TRAFFIC IT WILL NOT KEEP UP WITH TRAFFIC BUT TENDS TO BOG DOWN ALMOST GETTING REAR ENDED FROM BEHIND. IF YOU TRY TO SMOOTHLY ACCELERATE IT WILL RAPIDLY DOWNSHIFT AND JUMP FORWARD ALMOST REAR ENDING ANY VEHICLE IN FRONT. VERY UNSAFE TO DRIVE. TRYING TO DRIVE WITH THE FLOW OF TRAFFIC AT 35-40 MPH THE TRUCK SHUTTERS AS IF THE SPARK PLUGS ARE WORN OUT. ALSO TRYING TO ACCELERATE INTO ON COMING TRAFFIC IT WILL SOMETIMES CHUG TO WHERE YOU WONDER IF IT'S GOING MAKE MAKE THE MERGE. VERY FRUSTRATING TO DRIVE FOR A BRAND NEW TRUCK, THE DEALER REPLACED THE TORQUE CONVERTER AT 500 MILES, THEN HAS PREFORMED SERVICE BULLETIN #PIP5342B THREE TIMES WITH ABSOLUTELY NO IMPROVEMENT. GM STATES IN THE BULLETIN "NOTE: PREFORMING THIS CALIBRATION UPDATE MAY NOT TOTALLY ADDRESS THE SHUDDER OR CHUGGING CONCERNS" HOW CAN NEW VEHICLES CONTINUE TO BE SOLD WITH THIS KNOWN PROBLEM? NOT ONLY IS IT FRUSTRATING TRYING TO DRIVE SMOOTHLY, BUT IT IS ALSO A SAFETY CONCERN. DUE TO THE POOR PERFORMANCE THE MILEAGE IS ABOUT 13 MPG IN CITY TRAFFIC, NOT EVEN CLOSE TO THE MILEAGE RATING OF 17 MPG.