2017 GMC SIERRA DENALI Complaints

HARSH DOWNSHIFT INTERMITTENT BETWEEN 20 AND 30 MPH. BINDING/CLUNKING AT LOW SPEEDS WHEN DOWNSHIFTING INTO FIRST OR UP SHIFTING INTO 2. TRANSMISSION SHUDDER WHEN ACCELERATING IN FIRST GEAR. VEHICLE LUNGES FORWARD INTERMITTENTLY AT LOW SPEEDS WHEN SHIFTING.

ABOVE 35MPH I BEGIN TO GET AN EXTREME SHAKE AND VIBRATION. IT GETS MORE AND MORE PRONOUNCED AS I DRIVE. AT 65MPH IS NEARLY UNBEARABLE, AND SHAKES AND VIBRATES VIOLENTLY. IT GIVES ME HEADACHES, AND I CAN FEEL IT IN MY ARMS AS I DRIVE. I FIRST NOTICED IT ABOUT 100 MILES AFTER BUYING THE TRUCK. IT NOW HAPPENS DAILY. *TR

NOTICED VIVID AND PERSISTENT ENGINE VIBRATION SHORTLY AFTER PURCHASE - WITH NO ASSOCIATED CHECK ENGINE CODE. VIBRATION HAPPENS AT ALL ENGINE AND AMBIENT TEMPERATURES (ESPECIALLY BELOW 50 DEGREES FAHRENHEIT), AT ALL ALTITUDES, REGARDLESS IF IN PARK, NEUTRAL, OR DRIVE. VIBRATION IS SO NOTICEABLE, YOU CAN WATCH THE WAVES VIBRATE THROUGH A CLASS OF WATER WHEN PLACED ON THE DASHBOARD. TAKEN TO TWO DIFFERENT DEALERSHIPS AND BOTH HAVE STATED THE VIBRATION EXPERIENCED IS PER NORMAL DESIGN FOR 6.2L ENGINE. HARD TO BELIEVE GM WOULD DESIGN A $65K+ VEHICLE THAT PURPOSELY VIBRATES/SHAKES. ESCALATED THROUGH GM CORPORATE (SR# 8-3108393XXX), TO WHICH THEY CONFIRMED TRUCK IS RUNNING AS DESIGNED. SINCE THE ENGINE WAS NOT THROWING A CODE, NO FURTHER INVESTMENT/RESOLUTION WAS NEEDED ON THEIR END. THEIR SOLUTION TO ME...SELL THE TRUCK IF NOT HAPPY. OF COURSE THEY DID NOT SAY THAT, BUT THAT'S THE WAY I INTERPRETED THEIR RESPONSE TO MEAN. BUYER BEWARE.