2019 Chevrolet Colorado Power Train

Transmission shakes, lurchers when driving, transmission stalls then engages abruptly at low speed and highway speed.

The contact owns a 2019 Chevrolet Colorado. The contact stated that while driving at various speeds, there was an abnormal rumbling sound coming from the front of the vehicle. The vehicle was taken to an independent mechanic where it was diagnosed and determined that the transmission needed to be replaced. The vehicle was not repaired due to the part not being available. The manufacturer was notified of the failure. The failure mileage was approximately 80,000.

Transmission Component: M5T: TRANSMISSION AUTO 8 SPD, 8L45 available for inspection. The vehicle shakes badly and shudders during acceleration and causes a brief inability to accelerate, often at higher speeds and with a great deal of rumbling and vibration. No other warning lamps, messages, or symptoms. The problem first appeared about 2 months ago. I recognized it as a persistent problem, and I was no longer comfortable driving the vehicle and feared that it would shut down while driving. I took my vehicle for diagnostic and maintenance at a local service center who also noticed that the transfer case "is making an unusual squeaking noise when driving". I was then notified that this is a known problem with this vehicle make and model for 2019 and referred here to file a complaint. Having less than 60K miles on this vehicle, I was referred to the dealership for possible next steps.

Vehicle will make a loud humming sound going 50 to 65mph and when letting off the gas pedal. It will stop when pressing on the gas pedal or when vehicle slows down below 50mph

Transmission extreme Shudder

Transmission Issues — Shudder And Vibration; Stuttering; Vibration And Slams Into Gear At Low Speeds When Going Into Gear. Problem has been confirmed by a independent service center. No warning lights. No codes detected by service center. Bought in May of 2019. 47,000 miles. Noticed about two months ago,

My vehicle has only 70,000 miles on it. My transmission began to shimmy and is getting worse and worse and several technicians have told me the transmission will have to be replaced. The parts are not available anywhere in the country to rebuild the parts of the transmission that are defective. Secondly I was told I could replace the transmission but there are no transmissions available in the entire country to repair my vehicle with. After investigation on the internet this is a massive problem with this model vehicle and Chevy has been well aware of it for years. A few months ago I had the same problem with them air conditioner compressor. There were no air conditioner compressors available anywhere in the country for my four and a half year old vehicle.

The contact owns a 2019 Chevrolet Colorado. The contact stated that on several occasions while driving 60-70 MPH, the transmission was slipping, and the vehicle decelerated and shook before slamming into gear and then continuing to accelerate. There was no warning light illuminated. The contact stated that after stopping, the vehicle proceeded to move off in another gear other than 1st gear, then abruptly downshifted into 1st gear. There were no warning lights illuminated. The vehicle was taken to the dealer but was not yet diagnosed or repaired. The manufacturer was notified of the failure, a complaint was filed, the contact was added to a list, and then referred to the NHTSA Hotline. The failure mileage was approximately 37,000.

truck has intermittent vibration at highway speeds and they are getting worse. The dealer just called and said the torque converter was shot. That seems to be a great deal of the power train complaints

See attached document for complaint

The contact owns a 2019 Chevrolet Colorado. The contact stated while driving 15 MPH, the vehicle jerked abnormally. The contact stated that when the gear shifter was shifted from park to drive, the vehicle jerked excessively. In addition, the contact stated that while driving uphill, the transmission was slipping. The vehicle was taken to the dealer for routine service and the dealer was made aware of the failure however, the vehicle was not diagnosed. The contact stated that the failure was persistent. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 5,100.

Transmission slips when starting on steep grades, and transmission hesitation/shuttering between first and second gears.

Transmission slips when starting on steep grades when first shifting from Park to first gear. Transmission hesitates/shudders between first and second gears.

The truck has a hard downshift and when stopping and starting again at a stop sign it will lunge forward sometimes.Also,when holding speed at 50-60 mph you can feel a slight shutter like the truck is not running correctly.The dealer flushed the transmission when I purchased the truck but the issue continued so I made an appointment with the service department on march 3,2023.They took the truck on a road test and did notice the hard downshift and noted that this is a normal characteristic of this transmission(this is not normal and is unsafe)and will not offer to repair it.It is now the end of July 2023 and the issue continues and no one seems to want to do anything about it.I am going to take it back again but I am probably going to get the same answer

I pulled off the dealer lot with 3 miles on the odometer, came to a stop sign and damn near smacked my face on the steering wheel due to a hard downshift from 2nd to 1st gear. Pulled back into the lot and was told that "I have to break it in". As I laughed in his face, I knew I messed up buying a GM product. 20 miles down the road, I start getting transmission shutter during light acceleration. Took it back to the dealer and they ended up changing the fluid. As I was coming to a stop to pull in my driveway, the transmission hard shifted and threw me past the driveway. Took it back in to hear "Yep, that is GM acceptable". I am now having transmission shutter so bad, the truck will barely accelerate at 30mph or faster. This truck is absolute junk and I tell everyone I know, not to buy a GM truck. I will never buy an American made truck until they are made in America again, as they are overpriced and don't last. I want my money back!

Transmission problems. Vibrates under acceleration and deacceleration. Occasionally won't shift gears up or down, slips or hesitation between shifts. Violet jerks at times. Dealer has done a fluid drain and flush at 20k miles, replaced torque converter at 54k miles. Goes back in again on Monday for the same complaints. I'm responsible for transporting my 5 year old daughter to and from school. Difficult to travel highway speeds when it decides to act up. Research shows many design flaws and thousands of compliments. I fear for my families safety when driving this. I'm told it's safe by dealership??

Transmission will jerk/run poorly between 30-50 mph. This will cause deteriorated driving conditions and inability to stay with other vehicles with acceleration. Service performed by Chevrolet to rebuild transmission due to pump failure which damaged clutch pack. Service was covered under powertrain warranty. Rebuilt transmission now slips out of 3 and 4 gear and allows for lose of acceleration control.

TRANSMISSION SHUTTERING CAUSING CHALLENGES ESPECIALLY WHEN ACCELERATING

I EXPERIANCED TRANMISSION CHATTER AT AROUND 12,000 MILES. WHEN I READ THAT THIS IS A COMMON PROBLEM DO TO THE WRONG TRANSMISSION FLUID INSTALLED AT THE MANUFACTURER. IT WAS NOTED TO HAVE THE SERVICE DEPARTMENT CHANGE IT TO MOBIL 1 TRANSMISSION FLUID. AFTER 11,000 MORE MILES I NOW HAVE THE SAME CHATTER BACK. I FEL THAT THE SERVICE DEPARTMENTS DO NOT WANT TO DIVE FURTHER INTO FINDING OUT WHAT THE PROBLEM IS, CAUSE IT'S UNDER WARRENTY REPAIR AND THE DON'T MAKE ANY MONEY OFF OF YOUR COMPLAINT. SO THAT YOU COME BACK AND HAVE TO PAY OUT OF YOUR POCKET WHEN YOUR WARRENTY IS UP. THIS SHOULD BE A RECALL MATTER IN MY EYES. WRITE ALL YOUR COVERNS DIRECTLY TO GM AND VENT YOUR ANGER WITH THEM. AND IF THAT DOESN'T WORK I'M GOING TO THE NEWS CREWS TO MAKE IT KNOWN.

The vehicle shakes and shudders when accelerating and driving under normal conditions. The feeling is that of a very bumpy road or going over rumble strips. It is more evident in hot conditions and in more humid conditions. I have contacted several dealers, but none can offer or guarantee same day service, and none offer a loaner in case of a long repair. There have been no warning lights or service lights to the condition. The dealers do state that it is a known condition. The drive-ability is compromised, and it is very uncomfortable and unnerving to operate at this point.

THE TRUCK SHIFTS AGGRESSIVELY BETWEEN 10 AND 20 MPH. LIKE IT'S SLIPPING NOT ENGAGING INTO SECOND GEAR. STARTED NOTICING IT AT 16,000 MILES AND HAD THE TRUCK SINCE BRAND NEW.*DT*JB

THE TRANSMISSION HAS A DELAYED DOWNSHIFT, CAUSING THE TRUCK JUMP FORWARD DURING A STOP. WHEN COMING TO A STOP, IT FEELS LIKE THE TRUCK IS BEING HIT FROM BEHIND, AT THE SAME TIME, MAKING A LOUD MECHANICAL NOISE. SOMETIMES IT HITS SO HARD, IT WILL CAUSE THE TRUCK TO BE THROWN PAST MY DRIVEWAY, WHILE PREPARING TO TURN INTO THE DRIVEWAY. IT WAS RECOMMENDED THAT THE FACTORY TRANSMISSION FLUID BE REPLACED WITH A THICKER FLUID, SO I TOOK IT TO THE DEALERSHIP AND HAD THAT DONE. ALTHOUGH IT FIXED THE PREVIOUS ISSUE OF VIBRATION, CAUSED FROM THE TRANSMISSION SWITCHING BACK AND FOURTH BETWEEN GEARS RAPIDLY, BUT IT DID NOT FIX THE HARD AND DELAYED DOWNSHIFT. THIS HAS BEEN AN ISSUE FROM THE MOMENT I PULLED IT OFF THE LOT, WITH ONLY 4 MILES ON THE ODOMETER. THE TRUCK WAS IMMEDIATELY RETURNED TO THE DEALERSHIP, IN WHICH THEY SAID THEY COULD FIND NOTHING WRONG WITH IT. *TR

TRANSMISSION DOES A SLIGHT KICK BEFORE SHIFTING AT SPEEDS BETWEEN 20-45 MPH ON STREETS AND HIGHWAYS. GIRLFRIENDS SISTER-IN-LAW EXPERIENCED SAME PROBLEM WITH HER VEHICLE. HER PAPERWORK WHEN SHE GOT HER CAR BACK REFERENCED CHEVY'S BULLETIN# 18-NA-091

IN MOTION. 8 SPEED TRANSMISSION FAILS TO SHIFT RIGHT . IT SHUTTERS BAD.

TRANSMISSION IS SHUDDERING WHEN ACCELERATING. THIS SHUDDERING EVENT BEGAN AROUND 9,000 MILES AND HAS PROGRESSIVELY WORSENED. SERVICE BULLETIN 18-NA-355 HAS BEEN PUBLISHED BUT WITH MIXED RESULTS. REQUESTING GOVERNMENT AGENCY CONTINUES TO MONITOR THIS AS THE SUDDEN LURCHING COULD POTENTIALLY PUT DRIVERS INTO A DANGEROUS INTERSECTION OR BE UNABLE TO ACCELERATE TO AVOID A HAZARD. THIS IS A LARGE SAFETY CONCERN AND TRANSMISSIONS ARE EXPENSIVE TO FIX/MAINTAIN AND THE COST SHOULD BE ABSORBED BY THE MANUFACTURER AS REPORTS OF THIS ISSUE GROW AND BECOME MORE WIDESPREAD.