2017 Chevrolet Tahoe: sudden loss of power

Filed May 13, 2026 · Engine, Transmission · CA

My 2017 Chevrolet Tahoe LT 4WD with a 5.3L engine experienced sudden drivability issues related to confirmed AFM lifter failure, including severe engine misfires (P0300), rough idle, shaking at stoplights, and significant loss of power while driving uphill and under load. The vehicle has approximately 140,000 miles and has been consistently maintained through Chevrolet dealerships. The condition has been diagnosed by Premier Chevrolet of Carlsbad. The engine experienced loss of power during operation, creating a potential safety concern when accelerating or driving in traffic conditions requiring consistent engine power. This issue appears related to widely documented AFM lifter failures on GM 5.3L engines.

Filed May 9, 2025 · Electrical · WA

The system that I believe to be failing has to do with electrical components of the 2017 Chevy Tahoe. It has completely lost all power two times while driving this vehicle. In both instances, mine & my children's lives were at risk including those who could have hit us. If anyone had been behind me as I was turning and the car shut off mid turn, it's possible we could have been hit by a vehicle(s) going 50+ mph. It's available to you to be inspected if needed. The vehicle has been evaluated by a mechanic who says he cannot find any specific 'problem' but did have to turn off multiple error codes. The chevy dealership thinks it may have to do with the remote start antenna. This has not been reproduced by a dealer or service center but it has been reproduced by myself when I attempted to drive the car again after the error codes were turned off. I also have confirmation of this happening to another person who owns a 2017 suburban and after servicing the car they continue to have issues. They were entering onto a highway on the on ramp and their car completely lost power and stopped- I would hate to see what could have happened if this was on the highway itself as it could have had the potential of lives being lost. The only warning messages I have seen had to do with servicing the remote start, which has never worked for us despite having it worked on prior to purchasing the vehicle. There were messages about stabilitrack the first day this incident occurred but not the second time that it occurred. Both times the car will turn back on after about 5 minutes but it's as if the cars system was completely reset (clock at 12, radio setting default, etc). The fact that I know of one person with a 2017 Chevy that this has also happened to, I believe an immediate recall should be initiated as I will not be driving this vehicle until there is an answer to save our lives and others on the road.

Filed Sep 17, 2024 · Fuel system · FL

Vehicle's 6L80e Transmission broke at 101,786 miles. No gears remained but 1st gear which caused the vehicle to lose power when using the vehicle in automatic mode and essentially limped to the repair shop. Repair shop determined Whole transmission needs to be replaced 2nd gear was lost, 3rd to 4th gear was shuttering and 5,6 were lost. To replace the transmission it will cost of $4500. There were no warning lights on the dash There were no DTC codes on the OBDII scan

Filed Nov 6, 2023 · Body, Electrical · TX

The contact's brother owns a 2017 Chevrolet Tahoe. The contact stated that while driving 70 MPH, the check engine warning light illuminated, and the message "Reduced Engine Power" was displayed. Additionally, the vehicle decelerated to 20 MPH. The contact was able to pull to the side of the road. The contact stated that he turned on the hazards lights and continued driving 20 MPH. The contact stated that upon arriving to his residence, he connected an OBD reader to the vehicle and read diagnostic code P2138, which indicated an accelerator pedal sensor failure. The contact stated that he replaced the part himself; however, the failure persisted. The vehicle was taken to the dealer, where it was determined that there was water leaking inside the vehicle from the roof antenna mounting point, which caused the driver's side fuse box to rust, causing electrical failures. The vehicle was repaired. The manufacturer was notified of the failure and referred the contact to the federal safety agency Hotline for assistance. The failure mileage was unknown.

Filed Apr 10, 2023 · Engine, Transmission · NC

While driving down the highway at 65 MPH in a 2017 Chevrolet Tahoe, towing a boat, the stabilitrak service light/warning message illuminated, the check engine light illuminated, the vehicle began to shake, lose power, unable to accelerate, and slowed down to 55 MPH automatically. While trying to pull off the side of the highway, the vehicle continued to slow down to less than 40 MPH with no ability to accelerate. The transmission fluid temperature went all the way up to 282 degrees. We pulled off the side of the highway, let the car cool down for about 15 minutes, restarted the vehicle and attempted to accelerate slightly but the vehicle made a high pitched whining noise and would not move. The vehicle was towed to a Chevrolet dealer and was diagnosed with a failed transmission. This occurred at approximately 78,000 miles.

Filed Oct 16, 2021 · Transmission · TX

I was driving this vehicle in rush hour traffic and the check engine light came on and it suddenly lost power and wouldn't shift gears. I pulled off the road and placed the vehicle in park. At that moment I received an email from Chevy OnStar stating my transmission had a problem and to take it to the dealership. I had it towed to the dealer and was informed that the torque converted had failed and there were metal bits in the transmission fluid. The transmission had to be completely replaced to the tune of $6450.00. This vehicle has under 67K miles. There were no warnings prior to this incidence. This vehicle has been maintained at the prescribed GM service intervals.

Filed Apr 27, 2021 · Transmission · 110,000 miles · TN

My wife was driving on the interstate through birmingham, al and my 2017 chevy tahoe lt lost power. The transmission had one instance of a hard shift during highway driving, then just failed. She was luckily able to make it to the side of the interstate safely, tried to shift it into drive and the car rolled backwards. Had it towed to hendricks chevy and they found burnt tranny fluid and indicated the planetary gear appeared damaged. This truck is only 4 years old with only highway miles and the transmission now needs to be replaced. Chevrolet should be replacing these at no charge as this is a common problem with their 6 speed transmission. There were multiple tahoes in the same shop for the same problem. I have been a chevy fan all of my life but now rethinking that as they do not stand behind their product. The code you need to watch out for is the p0796 code, which is a fluid pressure failure. If you receive this code, you are likely going to have to pat 4-6k for a transmission. Step up to the plate chevy and take care of your customers.

Filed Mar 8, 2019 · Brakes · 40,000 miles · MI

Driving in traffic slow speed, brakes went to floor, lost power brakes, possibly vacuum pressure. Very hard to stop vehicle. Brakes worked after driving at a higher speed while attempting to exit the road. This is a brake booster/vacuum loss issue in my opinion. This is a 1 year old vehicle. This should not be happening. I have video of this happening.