2020 Chevrolet Silverado 1500 Power Train

My truck felt like running over rumble strips. At 17500 miles they replaced my torque converter under warranty. Now at 24690 miles they had to replace again, under warranty. With less than 25000 miles it is on it's 3rd torque converter. I fear that transmission is being damaged and feel Chevrolet needs to admit there is a problem. My current dealer calls it a lifetime warranty, with lots of strings, but Chevrolet should protect me.

Transmission shuddering and shaking while driving. Once in blue moon service light flashes for less than 1 minute then goes off with no diagnostic codes to show.

Vehicle developed a sensation at approximately 28,000 miles similar to driving over a rumble strip. At approximately 32,000 miles this was diagnosed as a failing torque convertor. There are TSBs related to this for the 8 speed transmission, but dealer stated no known TSBs exist for the 6 speed. The truck is currently in the shop getting the torque convertor replaced and should be available for pick-up in the upcoming week. Rumble strip sensation occurred under light throttle acceleration and presented more frequently on an incline. There were occurrences on flat ground, but this was not as common. The vibration occurred most often at highway speeds of around 70 MPH, but also occurred several times in the ranges of 20-30 and 40-50 MPH. Tachometer reading during these occurrences was around 1,500 - 2,000 RPM. Issue was intermittent and would come and go. Most of the time the sensation was mild, but periodically the vibration would be severe enough the driver felt like he had been rear-ended. A separate symptom would occur while going up hills and the tachometer would bounce up and down approximately 300 RPMs with a noticeable surging sensation. When presenting, the vehicle would surge forward every few seconds until the hill had been crested. This only occurred at highway speeds with cruise set and would not present when the rumble strip vibration was present.

My Silverado 1500 has developed torque converter shudder again over the course of the past few days. My current mileage is around 42,000. This is actually the second time this has happened on my specific vehicle and the current torque converter is actually the second, as I had my other one replaced after being confirmed by a dealer several months ago. I have only managed to drive around 10,000 miles between the replacement of the first part and the start of the second one failing. For information regarding the first failure please use reference ID 11458308. This has not yet been confirmed by a dealer, but I'm scheduled to get this serviced on Tuesday. I am certain that is what this is as this happened so recently. Primarily while driving at highways speeds between 1500 - 2000 RPM my Silverado will continuously surge forward every few seconds with a notable clunking in the rear. While this is happening I will watch my tachometer bounce up and down approximately 300 RPMs constantly, despite the fact cruise is set and this is on flat ground. The problem gets worse while driving uphill and increases the magnitude of the clunking/shaking. Under light throttle acceleration my truck will have a vibration coming from under the vehicle that feels exactly like driving over a rumble strip. This was the sensation that helped the dealer identify this as torque converter shudder the first time. No warning lights were present at time of incident.

2020 SILVERADO RST 1500 4X4 ALLSTAR WITH 8 SPEED TRANSMISSION. AT 4,000 MILES DEVELOPED A SHUTTER IN TRANSMISSION AND SLIPPING AND HARD SHIFTING MAINLY BETWEEN GEAR 1-2. BAD ENOUGH WHEN YOU START FROM A STOP WHEN IT SHIFTS YOU FALL FORWARD. THE ACCELERATION PUSHES YOU BACK AND THEN IT JUST SLIPS TO NO WHERE TILL IT CATCHES AND GOES. CONTACTED SHOP AND WAS TOLD AT 1ST OIL CHANGED THEY WOULD FLUSH THE FLUID PER THE SERVICE BULLETIN. THIS MADE IT WAY WORSE. SHIFTING IS MORE ROUGH AND SHUDDER IS MORE FREQUENT. TOOK IT BACK FOR THE 2ND TIME AND HAD TO DRIVE WITH A TECH SO THEY COULD EXPERIENCE THE ISSUE. IT IS GOING BACK TO THE SHOP TOMORROW 1/11/2020 WITH ONLY 7,500 MILES WITH HOPES OF A NEW TORQUE CONVERTER. THIS SHOULD BE A RECALL AND RESULT IN A CLASS ACTION. THIS ISSUE IS SO COMMON AND THIS TRUCK IS BRAND NEW. HAD IT IN SHOP WITH 2,000 MILES WITH AN OIL LEAK.

Popping sound and hard shifting during low RPM between low gears.

THE VEHICLE DOES NOT SHIFT INTO 4WD LOW RANGE. THE VEHICLE HAS BEEN TAKEN TO THE DEALER 4 TIMES TO CORRECT THE ISSUE BUT THE ISSUE STILL OCCURS.

2020 SILVERADO 1500 DURAMAX. TORQUE CONVERTER FAILED WITH 6700 MILES ON NEW LEASED VEHICLE. ORIGINALLY BEGAN HAVING TRANSMISSION ISSUES IN NOV 2020 WITH SURGING WHILE STOPPED IN COLD WEATHER. DEALER RESEATED ALL CONNECTIONS. BEGAN TO HAVE LOUD WHINING WHEN SHIFTING. TOOK BACK TO DEALER AND INFORMED IT IS TURBO WHINE. NOT CONVINCED. MARCH 2021 BEGAN SURGING AGAIN. RETURNED TO DEALER AND KEPT FOR WEEK. MECHANIC STATED COULD NOT PRODUCE PROBLEM. AS I DROVE TO THE MAIN STREET AT DEALERSHIP BEGAN SURGING. RETURNED TO SERVICE, MGR GOES WITH ME AND CONFIRMS ISSUES WITH WHINE AND SURGE. BACK IN THE SHOP. THAT WAS 22 MARCH AND AS OF 8 APRIL; TORQUE CONVERTER FAILURE AND ORDERED NEW BELL HOUSING. GOING ON 4 WEEKS WITHOUT TRUCK.

TL* THE CONTACT OWNS A 2020 CHEVROLET SILVERADO 1500. THE CONTACT STATED WHILE DRIVING 55 MPH DOWNHILL, THE VEHICLE INDEPENDENTLY SHIFTED INTO NEUTRAL WITH AN UNKNOWN WARNING LIGHT ILLUMINATED. THE CONTACT STATED THAT THE VEHICLE RESUMED NORMAL OPERATION AFTER THE VEHICLE WAS TURNED OFF AND RESTARTED. THE CONTACT STATED THAT THE FAILURE RECURRED SEVERAL TIMES. THE VEHICLE WAS TAKEN TO YOUNG BUICK GMC (325 OVERLAND AVE, BURLEY, ID 83318) TO BE DIAGNOSED. THE VEHICLE WAS REPAIRED HOWEVER, THE FAILURE PERSISTED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 21,000. ## VIN PASSED ## CHEVROLET 2020 SILVERADO ##

IM GETTING A HARD CLUNK SOUND WHEN SHIFTING INTO REVERSE. IT JUST STARTED HAPPENING AND ITS NOT FREQUENT ENOUGH TO TAKE IT IN TO REPLICATE.