2015 Chevrolet Tahoe: sudden loss of power

Filed May 3, 2026 · Electrical, Steering · SC

While driving, the vehicle experienced a total loss of power steering, accompanied by a 'Power Steering: Drive with Care' dashboard alert. The steering wheel became extremely heavy and difficult to maneuver. Simultaneously, the ABS and brake warning lights illuminated. Although I managed to bring the vehicle to a safe stop, a subsequent repair attempt failed to resolve the issue. The vehicle remains undriveable as the intermittent failure persists, creating a severe safety hazard.

Filed Jul 7, 2025 · Electrical, Lights · NY

The 2015 Chevrolet Tahoe seems to be known for thermostat failure. My thermostat gauge while driving would drop from 210 to 160 and stay pinned on 160 and the fans would turn on. I was told by an auto body shop that it seemed to be electric issues. I also had a wire under the car catch fire and the auto body shop said that is why my standing lights would not work in the rear but my brake lights would work. It’s very dangerous that the electrical failure caused a fire to start under the car. Then, I ran into another issue just this week where the vehicle has a cracked AC condenser and is slowly losing coolant. It’s a manufacturing issue because all of them seem to crack and we’re not made with a proper seal. Another electrical issue I have is when I turn the wheel all the way to the left or right, even when the key is in and engine is on, the engine will shut off. The car completely shuts off and then I have to turn the key to the off position and then it will turn right back on. The steering wheel is also losing power steering and gets very tight when I have to make a turn. The fuses for my radio are blown and when you put new ones in, it blows immediately and doesn’t turn on. I have MANY issues with this vehicle and it’s obviously a manufacturer issue. This is not ok for a vehicle to all around have such horrible electrical issues. I have had issues driving over a pothole and I lose my radio screen or my whole dash screen and then the dealer and auto body shops say the electrical work is too in depth for them.

Filed Feb 22, 2025 · Engine, Fuel system · CA

While driving multiple times the vehicle has completely lost power or almost died in the middle of the roadway. It has been taken to the dealership multiple times and they are reporting transmission and catalytic converter issues, however these issues were present at 20,000 miles and taken back to the dealership to be fixed. This is now a reoccurrence of issue and the dealership refused to warranty or fix the reoccurring issue. Loss of power while driving and random acceleration have occurred and almost caused accidents on multiple occasions

Filed Jan 21, 2024 · Brakes, Driver assistance · LA

Went to start my vehicle 10min prior to me taking off. Five min into my drive I felt my Tahoe start to lose power stop shifting. Once i was able to pull over to a safe location put the car into park and put the car back into drive and the car will not move.

Filed Aug 25, 2023 · Transmission · TX

The torque converters for the 2015 Chevy Tahoe’s or the 6L80 transmission are failing at a rate not seem on a newer vehicle. Chevy dealerships in my area are backed up for 2 to 3 weeks just to look at the possible problem. The failure appears to be due to poor design of the transmission torque converters. Safety is at risk due high failure rate that could occur at highway speeds and thus making the vehicle stop without brake lights and possible fail in the middle of the highway. At highway speeds this failure could cause serious damage and possible death. Due to the 2 to 3 weeks for the transmission to be looked at by Chevy, I chose to take my vehicle to a private repair shop. Prior taking my vehicle to the shop the shop knew based on the high failure rate that my transmission failure was based on the torque converter but the total damage was not known until the transmission was rebuilt. The transmission torque converter problem was reproduced and confirmed by an independent service center. The Transmission was inspected by AAAA transmission located in Fort Worth. The only warning I had of the failure of the transmission torque converter was accelerating to access the highway and the vehicle started to lose power and shutter due to the lack of acceleration. The luck for me was the highway was not crowded and I did not merge on the highway with the loss of power and possibly getting hit from behind by another vehicle. There were no warning signs of the failure the vehicle just started showing signs of the failure that day. The failure first appeared on June 30, 2023. Attached is the copy of the repair bill and pictures of the metal shavings due to the failure of the torque converter which destroyed the transmission pump. The shavings are steel and aluminum particles.

Filed Jul 14, 2023 · Transmission · MI

Transmission issue 2015 Tahoe: When accelerating when entering freeway to merge, or similar, vehicle sometimes experiences a sudden loss of power and lurch sensation -- almost feels like the truck was hit. Speed doesn't increase when needed in crash avoidance maneuver or when accelerating during general driving. Eventually transmission failed. Rebuilt. Has the same issue now. Appears this is part of GM class action lawsuit for transmissions and torque converter issues. Very disappointing.

Filed Apr 3, 2023 · Electrical, Engine · MA

The car was bucking on the highway it was losing power without notice. There was no prior notice from Onstar system either of any mechanical issues . There was No prior indications or check engine light before this instance. I was coming home in the dark on the highway which was a dangerous position to be in. The car's transmission Failed out of no where! I have had the car 22 months and was purchased from the Chevrolet Dealer.

Filed Mar 31, 2023 · Engine, Transmission · IL

I own this 2015 Tahoe, it has 80,000 miles on it. While I was driving to work, the vehicle lost power as I was in the middle of major intersection. I was almost rear ended by another car. A few seconds later the car began going again. I had no service lights, no warning lights and no check engine light come on. It was running rough, lacking acceleration. I immediately brought it to my mechanic. They did they're testing and found Cylinder# 6 has collapsed. I was told that I will need a new engine at costs of over $8000.00. I have always maintained my vehicle and it's had regular oil changes every 4000 miles. In fact I'm still making car payments, and now I have to absorb this major cost of replacing an engine. When I looked on line to find some information of this Lifter problem, I found thousands of complaints of premature engine failures on these very expensive vehicles. I believe GM or Chevrolet needs to have a solution to this. How can they expect us consumers to afford this costly repair on such low mileage vehicles. Please look into this Manufacturers problem

Filed Feb 10, 2023 · Acceleration, Electrical · FL

Check engine light came on after vehicle starting losing power in steering column. Speedometer was moving up and down with some other gauges doing the same simultaneously. The vehicle provided warning of stabilitrak after dismissed, it gave another warning stating, “Steering Assist is Reduced Drive with Care.” It became harder to accelerate and very distracting as the stabilitrak error continued to pop up with the speedometer and other gauges, such as RPM, going up and down continuously. These gauges would then stop working altogether then start to work briefly. Then, the gauges would continue to malfunction by going up and down with the stabilitrak error on screen. I got off the interstate and I have having issues with acceleration from first gear. Vehicle was hesitating which was terrifying. It was failing to engage. Transmission fluid rose from 187 to 208 degrees during a brief time period on the screen. Could not use the M gear at all.

Filed Nov 6, 2022 · Electrical, Lights · WA

On several occasions at various speeds, both driving straight and turning, my 2015 Chevy Tahoe has turned off. During higher speeds the SUV will turn back on, instantly, by itself but during lower speeds and turning the car has to be manual turned back on by switching into neutral, pressing the break, and pushing the start button. The most recent time this has happened, it was dark outside and I was turning. I lost everything including my head and tail lights so it was hard for oncoming traffic to see me. I also almost hit someone coming in the other lane because I was unable to fully turn due to the loss of power steering. After this happens, I get many warning/action required messages across the dashboard but no check engine light or code have come up. I will be taking it to the dealer but since it does not happen every time the care is driven, I can only hope they can experience what happens.

Filed Sep 15, 2022 · Engine · 157,503 miles · TX

The contact owns a 2015 Chevrolet Tahoe. The contact stated while driving approximately 70 MPH, the vehicle lost motive power and decelerated to approximately 50 MPH. The contact pulled over and the steering wheel locked. The contact stated that the check engine, Reduced Engine Power, Stabili-trac, and other unknown warning lights were illuminated. The vehicle was turned off and restarted; however, the steering was still locked. The vehicle was shifted into drive(D) and failed to respond. The vehicle was towed to the residence. The vehicle was not diagnosed by a dealer or independent mechanic. The vehicle had not been repaired. The manufacturer had not been contacted. The failure mileage was 157,503.

Filed Aug 16, 2022 · Steering · AZ

Six days ago my 2015 Chevy Tahoe had a sudden loss of power steering assist while driving down the road after having to come to a sudden stop. The sudden loss and stop required me to jar to the R side of the road. Later in the evening while driving home from work, suddenly my power steering began to work again - causing the steering wheel to have a lot of "play" in the turning of the wheel. This sudden loss and sudden return of power steering has increased since the first incident and happens more often than not. Every time the loss or return happen to the steering, I feel like I lose control of the vehicle to an extent depending on the speed of the vehicle. I am a single mom with two little children who are constantly with me in our vehicle which concerns me for all of our safety. I have done my due diligence on contacting the local Chevy dealership, GM and even the better business bureau due to not being able to get to the bottom of this and continuously being told there's no recall connected to my VIN. There was a recall previously for the Power Steering Assist Motor Kit in 2015 Chevy Tahoes. According to GM which I contacted today, my vehicle was a part of this recall and the assist motor kid was "fixed" which is why there are no current recalls on my VIN. We were told there was a 12 thousand mile warranty that was placed on this new Assist motor kit however, the same issue is now happening again. In the initial recall, chevy was told that dealers are to replace power steering assist motor kit due to increased risk of crash. Dealers are to service all vehicles subject to the recall at no charge to customers, regardless of mileage, age of vehicle or ownership from this time forward. The fact that I am having the same issue with the assist motor after its already been "replaced" is quite concerning for me, my children and quite frankly other bystanders or other drivers with the increased risk of an MVA. I had an auto body shop diagnose the issue with the same resu