2020 CHEVROLET TAHOE Complaints

The 6.2L L87 V8 engine in my 2020 Chevrolet Tahoe Premier RST suffered a catastrophic internal component failure while operating. The engine experienced a sudden, severe internal mechanical breakdown involving the crankshaft or connecting rod bearings, completely disabling the powertrain.This failure causes an immediate and dangerous loss of vehicle propulsion, creating a severe safety hazard on public roads.General Motors has already issued Safety Recall N252494001 (NHTSA Campaign 24V924000) for identical L87 engine bearing failures, but has arbitrarily limited the scope to 2021–2024 model years. My 2020 vehicle uses the exact same L87 engine family and has suffered the exact same catastrophic defect.I am filing this report to urge the NHTSA to expand its current Engineering Analysis (RQ26001) and force General Motors to expand the safety recall to include 2020 model year vehicles before more consumers experience sudden engine failure while driving."

Transmission valve , vehicle shutter, and eventually complete loss of power and failure. Transmission had to be replaced as vehicle was out of warranty.

The dealership where I get my 2020 Chevy Tahoe service, stated that there is a recall for the water pump for the 2020 Chevy Tahoe, due to a manufactory defect, causing the water pump to leak. On XXX, mileage 62,777, I had to replace my water pump for that same reason, but my vehicle was not part of the recall; therefore, paying for a placement water pump myself. The dealership is Musson Patout Automotive Group/GMC, 214 West Hwy 90 Frontage Road, New Iberia, LA 70560, [XXX]. I am requesting that my vehicle be added to the recall list, due to this oversite. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My transmission failed, yes it is available for inspection. The failure occurred without warning. I was driving my truck on the highway, suddenly it began to hesitate and making a loud winding out noise. The truck was hesitate on going forward. Yes, I had the vehicle towed to Banks Chevy, I was told the torque converter blew metal shavings into the transmission and it was a common problem with these vehicles. No warning at all, I just had my oil changed at the dealership, it was running great, out of nowhere this happened.

Chevrolet has a recall on some vehicles for a bad transmission valve body, but my vehicle isn’t a part of the recall and I’m having the exact same issues. Currently my only vehicle that I have to transport my 7 month old is a complete safety risk. My check engine light is on and the code its throwing is to replace transmission valve body assembly. My Tahoe is shifting very harshly when driving normally, it feels like it slams into gears causing the whole car to jerk. When sitting at a red light that turns green, Tahoe is slipping, barely wanting to move through an intersection with vehicles all around me. I’ve been advised to not drive my Tahoe at all because if I do I will certainly have severe drivetrain damage and rear wheel lock up. Like I said, Chevrolet already has a recall for this issue on some of their vehicles, but my specific Tahoe does not. This is my only vehicle for myself and my baby and I cannot drive it due to its safety issues.

Tahoe transmission failed with 103,000 miles… took to Chevrolet they confirmed, took to a transmission specialist they confirmed failure but they said the computer was throwing weird codes and they believe this has a factor in transmission issue. On the way home the brake system alert went off and the car would not go above 35 miles an hour … I get this is a safety feature but it was dangerous in the location this occurred ans this car was not that old and does not have high miles to justify this type of issues

I own a 2020 Tahoe, 160,000 miles. While driving, the vehicle experienced a sudden loss of brake assist due to a failure of the vacuum brake pump. The brake pedal became extremely hard, and the vehicle would not slow or stop as expected, requiring me to put vehicle in neutral and frantically find a way to the shoulder to force a stop (pulling the emergency brake). This created a dangerous condition and significantly increased stopping distance, posing a serious safety risk to myself, and others on the road. There was little to no warning prior to the failure. This issue appears to be consistent with known complaints involving vacuum pump failure and loss of brake assist in similar vehicles. A failure of the braking assist system is NOT a normal wear condition and presents a critical safety hazard. I am reporting this incident due to the safety risk associated with sudden brake assist failure and the potential for accidents or injury. Vehicle issue has been confirmed by an independent service center. There was a warning light that appeared at the same time the brake stopped working leaving me no time to plan or know ahead not to drive.

The air conditioning system fails to cool. My vehicle only has 47,000 miles on it currently and is well-kept. A professional garage inspected and advised that there was a leak in the refrigerant system. I contacted my local Chevrolet dealer Jeff Gordan Chevrolet where I purchased the vehicle new and they said the issue was not under warranty and that my warranties had expired. They would not repair the air conditioning system at no cost to me, the owner.

On June 17th, 2025 while driving from [XXX] back to my home state of [XXX] , I experienced an engine malfunction in Chester, Va where the 6.2 L87 engine was shaking and had severe hesitation. It was diagnosed by the Chevrolet dealership in Chester, VA as suffering severe failure of ALL 8 fuel injectors, fuel rails and connector harnesses, resulting in a 15 day repair wait and a $4,644.50 bill not including other expenses such as lodging/car rental. At this time my vehicle had 52,182 miles. After this I attempted for 3 months for GM to cover the repair as the vehicle was less than 5 years old and less than 60,000 miles under the 5 yr/60K warranty but denied it. On March 26th, 2026 while driving on the parkway at about 60 mph, my vehicle experienced loss of power (slow deceleration, shaking/hesitation) and I immediately took it to the repair shop where it was diagnosed as a P0308 code (misfire on cylinder 8) which caused a repair of the #8 spark plug, ignition coil and wire resulting in a $380. repair. Two days later, I experienced the same issue and then took it to an engine diagnostic specialty shop where I have been told that this issue will run about $4,000 due to valve and comprehension issues on an engine that has 60, 680 miles. I have seen numerous L87 engine complaints on Chevy Forums with no assurances that repairs or engine replacement will rectify the issue and feel that this is an issue that GM should be addressing for safety issues and an economic loss to its customers. I am hoping that your investigators can help the many people that have been left stranded by this incompetence and lack of admission of GM's part. Repair invoices available upon request. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Suddenly lost all power steering, then warning power steering attention, no control for steering, very dangerous, couldn't drive vehicle. Took independent car repair to fix. $5k repair to fix problem. Should not happen to vehicle.