general problems of the 2021 Chevrolet Tahoe - part 2

Check engine light came on. Upon diagnosis', the engine is misfiring, lifters are not performing correctly and there are critical engine alerts and an estimate of 11,000 to fix. 2021 - 83,000 miles v8 - 5. 3 not the 6. 2 and no one will help me bc my power train expires. I am the only owner. Second brand new Tahoe ai bought from this dealership and they are doing nothing to help.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while her husband was driving 40 mph, the "service stabili-trak soon" message was displayed on the instrument panel. The contact stated that there was an abnormal knocking sound coming from the engine and the contact's husband pulled over and restarted the vehicle. The contact stated that after the vehicle was restarted, the failure persisted. The contact's husband pulled into a gas station and called an independent mechanic. The mechanic advised the contact's husband to safely drive the vehicle home and to then take the vehicle to his shop the next day for a diagnostic test. The vehicle was driven to the independent mechanic and was diagnosed, and the contact was informed that cylinders #1 and #7 were not functioning as needed. The contact was then informed that the engine lifters needed to be repaired. The manufacturer was notified of the failure and parts were ordered to repair the vehicle. The vehicle remained in the possession of the mechanic and was not yet repaired. The failure mileage was approximately 75,400.

“catastrophic engine failure” as stated by Chevrolet dealership service department. Loud rattling noise prompted service visit. Not 6. 2 liter engine, but almost identical issue.

Several issues with certain popups regarding various indicators on dash and engine not getting enough psi.

We are apart of the safety recall with the potential brake and engine issues, we have contacted the dealership and they have no remedy at the current time for our defective vehicle. We contacted gm to request a buy-back due to the safety issues with the vehicle, told we did not qualify but they have no remedy for our defective truck. We do not fell safe in the vehicle, the brakes are sticking and the engine is making weird noises. We are currently seeking legal representation because we are being forced to drive around our family of 5 in an unsafe vehicle with no remedy or option to trade it in.

Automatic fuel management/ displacement on demand caused lifter failure which caused cylinder failures.

Engine burning through oil excessively. Has been noted on multiple occasions and requires early changes and top off. Is also happening with 3 friends with the same make and model with the 6. 2l. No warnings but was informed it is common at shop.

On April 25th, 2025 we were taking our kids to their after school activities when the SUV started to shake, and accelerate very fast by barely pushing the gas pedal, the ets light along with the forward collision warning also appeared on the dashboard along with the check engine light. This prompted my husband to get our vehicle towed to the nearest shop close to the street where our vehicle started having problems. After several days of diagnostics the shop let us know our vehicle needed the following repairs: bank one lifters replacement, head gasket service, and a water pump replacement, we ok'd the repairs. Although these components were replaced, we were informed on may 15, 2025, that the vehicle continues to misfire and now requires a camshaft replacement as well. The total cost of the repair has now risen from $5,182. 16 to $13,549. 79, which is a significant financial burden as the vehicle is just outside of warranty coverage. We are aware that there is an active recall covering similar issues for 2021–2024 Chevrolet Tahoes equipped with 6. 2l engines. However, our 5. 3l engine model is experiencing the same mechanical failures, including misfires, knocking noises, low rpm idling, and performance degradation. There is growing evidence that the valve lifter issues are not limited to the 6. 2l engine variant. Our experience—and the experiences of others reported online—suggests that the 5. 3l l84 engine may also suffer from the same design or manufacturing flaws. We respectfully urge NHTSA to investigate whether this issue warrants expanding the scope of the existing recall to include the 5. 3l engine models, and we ask that GMC/general motors be encouraged to provide assistance. Given the severity and known pattern of these issues, we believe GMC should cover at least 75% of the repair costs, or ideally, offer to perform the repair at no charge. Thank you for your time and consideration.

On April 25th, 2025 while traveling on interstate 20 at 70+mph speeds with my children in my vehicle and 30 weeks pregnant, with no indication of an issue my 2021 Chevrolet Tahoe suffered catastrophic engine failure. There was zero warning from the vehicle including noises/electronic display warnings that this was fixing to occur. In the middle of going 70+mph surrounded by traffic on a busy interstate the vehicle just shut off completely. I was able to use what momentum I had from my speed to get on to the shoulder. However, the failure prevented me from being able to turn on my signal to alert other drivers of my merging and prevented the use of my emergency flashers to signal once on the shoulder immobile. The vehicle would not start up again after that, and I had to call a tow truck to take my vehicle to the nearest certified Chevrolet service center. When the tow truck arrived the vehicle would not even shift into neutral allowing them to load it without potentially causing more damage. It had to be drug with the wench in park onto the tow truck bed. Once at the nearest service center I was told it would be up to 3 weeks + before they could do a diagnostics. I was 14 hours from home when this happened, and now had to pay to have my Tahoe towed 14 hours back to the service center near my home. On may 8th the failure was determined to be caused by this recall, specifically the crankshaft. The dealership has lied and said they've ordered a new motor and it came in, then called to tell me they ordered the wrong motor. They said they ordered the correct one and it would be in within 14 days, and that was 25 days ago. They called today June 16, 2025 to tell me there is still no update on when my engine will ship to complete this repair. The dealership has also refused to assist me with any loaner vehicle or rental assistance even though gm has told me I am entitled to it under this recall. Gm has moved my case to parts delay team and I still have not been contacted.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving 15 mph, the vehicle lost automotive power and stalled. The contact stated that several unknown warning lights were illuminated. The vehicle was towed to the dealer but was not diagnosed or repaired. The contact called the local dealer and was informed that there were no associated recalls. VIN tool search showed: NHTSA campaign number: 25v274000 (engine and engine cooling). The manufacturer was not notified of the failure. The failure mileage was approximately 10,440.

While starting from a stop the engine stuttered and resulted in a major loss of power. Luckily this occurred pulling out of our driveway on to a quiet neighborhood street. Several warning lights and messages went off including the engine and transmission system warning, “service esc”, “service traction control”, and the emission system warning. After driving it to the dealership at 30mph since the shaking and banging noise was so bad, the dealer diagnosed it as a cylinder 6 caused by a failed lifter and lifter rod. Resulting repair involved lifters and rods in that same bank at a $3500 repair. The vehicle was just over 4 years old with 79,250 miles. Repair invoice available upon request.

While traveling on the highway one day, my 2021 Chevrolet Tahoe began warning lights on the dashboard. Shortly after, it running roughly,, and jerking, so I pulled over to investigate. There no visible smoke, so I drove to the nearest auto parts store, where they ran a diagnostic test that returned a code of p0306. I then took vehicle back to the dealership where have always received oil changes and repairs. I have never visited any other dealership, relying on certified gm/Chevrolet dealerships. After inspecting the vehicle, they informed me that the lifters needed replacement advised that it would be best to replace the engine entirely. Upon further research, I discovered that issue has been affecting many people in our area and across the united states. This needs to be addressed, as the vehicle is only three years old, purchased brand new with zero miles, and I have not done anything out of the ordinary to cause this problem. The vehicle being 70,000 and 12. 000 for repairs is insane.

2nd glow plug failure.

After I washed my 2021 Chevrolet Tahoe, I went to run some errands. As I pushed the start button, the car would try to start but did not. I tried several times without success. I had the truck towed to ed morse Chevrolet in sunrise, florida. My odometer is at approximately 43,000 miles. About 3-4 months ago, at 42,000 miles, I had the same situation. I had to have the truck towed to ed morse. At the time, the service writer told me it was probably the fuel cell module and that chevy has been a problem with them. The service writer surprisingly admitted that this issue could cause the truck to stop in the middle of your commute! I told him that an issue this serious needs a recall. So, today, when aaa picked up my truck, he said that this happens frequently and he towed many Chevrolet Tahoes and pickup trucks with this issue. The aaa technician even reiterated that the fuel cell modular failure shuts down your vehicle while driving! this is insane and troubling. Within 1000 miles, I will need 2 fuel cell modules and there is no guarantee that this one will last. Thanks tom klem eversoslim@att. Net.

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving 70 mph, the check engine warning light and other unknown warning lights illuminated. The message "loss of oil pressure" was displayed, and the vehicle made an abnormally loud banging sound. The contact was able to continue driving at slow speeds with the hazard lights engaged. The contact drove to the dealer, where he was employed. The dealer diagnosed that the engine lifters had failed. The vehicle was then towed to the Chevrolet dealer, where it was diagnosed that the lifters had failed. The dealer provided an estimated fee for the repair. The vehicle was towed to redline performance llc, where it was diagnosed that there were metal shavings in the oil pump, camshaft, and in other unknown parts, along with the lifters failure. The mechanic replaced the lifters, the connecting rod, the camshaft, the oil pump, and other unknown parts; however, the failure recurred after picking up and driving the vehicle to the residence. Additionally, there was smoke coming from the engine. The vehicle was towed to stan mcnabb Chevrolet columbia (101 s james campbell blvd, columbia, TN 38401), who informed the contact that the vehicle would not be diagnosed by the dealer. The contact became aware that the VIN was included in NHTSA campaign number: 25v274000 (engine and engine cooling), which the contact related to the failure; however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 66,000. VIN tool confirms parts not available.

Driving on a highway to dallas and vehicle loss power and locked up in the middle of the highway. Was stranded on the highway for 4 hours. Vehicle would not start up and had to get towed to local dealership. Dealership diagnose the problem and stated that the engine has failed. I got the vehicle towed back home to my local dealership and they confirmed that the engine has failed. The vehicle showed no signs of engine issues. Gm needs to recall this vehicle.

We had a failed lifter that caused bent rods which caused scratches on the crank shaft which caused us to have to replace the engine. After a simple internet search I have found the lifter failure is very common with gms 5. 3 v8. We were told oil needs to be changed at least every 5000 miles although the vehicle prompts you around 7000.

2 incidents of complete engine power loss while driving. Luckily was able to roll off road safely to curb. Dashboard glitch/flashing multiple/various message, including check engine, conditions not ideal to shift, etc. Would not re-start/shift when attempted. Tried disconnecting battery cable completely and re-connecting and that seemed to 're-set' the system and engine re-started. Incidents were about 30 days apart. "this battery reset" was tried because approx 1 year prior after leaving Tahoe parked at airport for a 7 day trip, it would not start, completely dead. Battery charge/jump would not work. . . Watched youtube videos and someone said to try disconnect/reconnect cable and it worked to start it up at that time & did take it into dealership after that incident and no-cost repairs were made for that issue. Called chevy 3/25/25 on this power loss while driving issue to ask for information/assistance, they advised to take to dealership for diagnostic info/report and depending on result/cause might assist with costs to repairs. Appointment set for 3/28/2025 with salem oregon Chevrolet.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that upon coming to a complete stop, the vehicle suddenly jolted forward independently. The vehicle returned to normal functionality, but the failure became a regular occurrence. No warning lights were illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the valve body. The vehicle was not repaired due to part availability. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 57,000.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while her husband was driving at an undisclosed speed, several unknown warning lights illuminated, and the engine made knocking sounds. The message "service transmission" was displayed. The contact's husband pulled over and turned off the vehicle. The vehicle failed to restart immediately. The vehicle was taken to the dealer, who replaced the camshaft retainer, valve tensioner kit, gaskets, seals, lifters, engine bolts, rods, and pipes; however, the "service transmission" message displayed again while driving. The dealer was made aware of the failure, but the vehicle was not yet diagnosed or repaired. The manufacturer was made aware of the failure but informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 89,678.

Sudden engine failure while driving. Was able to pull to the side of the road with a few hundred feet. Repair required full engine replacement. Have to other friends that drive similar gm products that also experience engine failure with 3 weeks of our incident.

I was driving along the highway at 11pm when I the vehicle started shaking and I heard strange sounds coming from outside the vehicle. I pulled over to inspect and realized it was coming from the engine bay. The engine was making knocking, rattling, and belt slipping noises and the entire vehicle was shaking and the engine also stuttering. I was able to drive the vehicle to a nearby plaza where I had it towed the following morning. There were no warning signs, the vehicle ran properly up until this occurred. The dealership inspected it and told me the engine needs to be replaced and it was likely that a rod bearing that went bad. This happened nearly 2 months ago and I am still waiting for a new engine.

Engine knocking while accelerating. Told by chevy dealership that a thruster is broken. Car is only 4 years old with 60k miles. Unfortunately, not under warranty. Quoted $5,000 for fix. No errors on dash or visuals of the problem.

Vehicle has no warning of issues. Regular maintenance had been performed and had 80k miles. Driving down a 4 lane the engine locked up and lost power. We have been waiting on it to be repaired for 4 months now. The engine is back ordered from gm and no one can find used ones. We found a refurbished one but it also locked up within 30 minutes of being installed. I was warrantied so now we are having ours rebuilt but is costing us $14k.

My wife was driving the vehicle when all of a sudden the engine started knocking and throwing a bunch of codes. The engine has a bottom end knock and it seems this is a known problem with these engines.

I am getting heavy oil consumption and the dealer just keeps on wanting to run tests and not fix the actual issue.

On [xxx] I was driving in the [xxx] in el paso texas at about [xxx] I was about to enter [xxx} and the vehicle suddenly stopped with no warning! I was able to pull to the side and put the blinkers because the traffic was heavy and could of had a vehicle crash into me if I had not maneuver the vehicle quickly(my two daughters where with me in the vehicle). The vehicle prompted to start the vehicle, which I did so and continued my way. As soon as I was able to get into the [xxx] the check engine light turned on, and the forward collision warning message on the display. I stopped to my nearest autozone to get some help as the vehicle started to make a noise too. They connected their computer and told me that the vehicle was given a message of a faulty cylinder, they told me I should not move the vehicle until I had it inspected on a gm dealership. Which I did on Friday December 20, 2024, I am waiting for a full diagnostic to see what had happened to my vehicle. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Gm has a known issue with engine lifters on this model engine that fail around 60,000 miles. Customer service managers even stated so themselves and gm has a TSB related to this. Repair bill is $5k-$6k if it doesn’t bend the cam shaft and upwards of $10k if cam is bent. This is a huge safety issue because vehicle fails while in motion, shakes violently, and numerous safety features the driver relies on turn off.

I have taken this vehicle two times to the dealers that sell Chevrolet. The first time it was there for 5 hours and nothing was done and the second time the service agent said there was no recall on this vehicle when obviously there is one.

Engine failed while driving down the road. There was not prior warning signs to this issue. Vehicle was unable to accelerate. The safety of myself and husband were put a risk as we were traveling on an interstate 12 in baton rouge, la. The vehicle was inspected by pine belt chevy and the cause identified as camshaft and lifters failed in the engine causing a sudden deacceleration.

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving 5 mph in the driveway, the vehicle stopped and stalled. The vehicle failed to restart. The vehicle was towed to an independent mechanic who determined that the fuel pump control module needed to be replaced. The vehicle was repaired. The contact called the local dealer and was informed that there were no associated recalls. The vehicle was not diagnosed or repaired. The manufacturer was contacted and confirmed that the vehicle was not included in NHTSA campaign number: 21v739000 (fuel system, gasoline). The failure mileage was approximately 30,000.

2021 Chevrolet Tahoe engine began misfiring and check engine light and esc warning indicators displayed as I was driving. I pulled over and shut off vehicle, read manual and restarted engine. Same problems occurred, so I drove to Chevrolet dealer which was a mile away. The advisors said I shouldn’t drive it on the expressway or any further since engine had known problems that gm was aware of and it would blow up. Scans showed p0300 & p0305 for cylinder 5 misfire. Major repair included replacement of all lifters and push rods on both banks and the camshaft taking 17 days. This engine should have a gm recall due to its severity. I was told the engine usually blows up before the warranty period is over and gm would just fix it. Unfortunately for me, my engine failed after full warranty and while I was traveling out of state to a family wedding, costly me directly. Gm did pay half of the cost of repair which indicates admitting fault. The major safety concern is when an engine blows up and the driver cannot control the vehicle causing accidents or fire (and being stranded). There were no previous indications or symptoms of engine failure prior to date the problem occurred. Police departments in illinois have had the same problem with this engine and their entire Tahoe fleet needed a new / repaired engine. This is an unacceptable action by gm to just wait for the problem to occur instead of proactively recalling the engine for repair.

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving on two occasions at various speeds, the rpm needle dropped, and the vehicle stalled. There were no warning lights illuminated at that time. The vehicle was not able to restart each time. The vehicle was towed a dealer where it was diagnosed that he fuel control module needed to be replaced. The vehicle was repaired, but the failure reoccurred approximately 10 months later. The manufacturer was not notified of the failure. The failure mileage was approximately 67,438.

Stopped for gas, then proceeded to leave store, the check engine light came on, and car immediately shut off while on the highway going ~25mph. Car would not turn back on, and then lights for fuel machine error started coming on. Car sat there trying to turn on, lights off, and then would say push start button, but nothing happened. Car began to shake and continued to try to turn on, yet nothing happened. Car was towed to home, sat for an hour and then started again, check engine light remains on.

Driving on the I-95 I abruptly lost power driving in the left lane, rpm dropped all the way down and speed was rapidly decreasing. I had to pull over on the shoulder in the most safe manner possible for myself and other drivers on the road; but it was not without any risk. The body of the car was rattling on my way to the shoulder and the car shut off before I could put the car in park in a safe place. With my hazard lights on I tried restarting the car but the enging would not turnover, the starter would run and the car would rattle about all whilst creating a traffic jam. Once I noticed the engine light and yielded to the car's inabiltiy to start up, we got the attention of a fhp state trooper who called in a tow truck for us. Getting te car onto the tow truck in traffic also increased the risk associated for everyone involved. Aftert succesfully oading the car, which was no smooth task as the car could not shift into neutral; we took the car to my local firestone. After a diagnostic test done the following morning, we were notified of a fuel pump issue that has been on the recall list for my vehicle, but not associated with my VIN.