2020 Chevrolet Tahoe: sudden loss of power

5 of the 58 complaints about the 2020 Chevrolet Tahoe describe sudden loss of power.

owner complaints: 5
of this car's complaints: 9%
recalls: 0

Is there a fix? 177 service bulletins cover this area of the car. See below

Sudden loss of power by model year

2026
10
2025
5
2024
7
2023
21
2022
12
2021
49
2020
5
2019
12
2018
1
2017
8
2016
10
2015
22
2014
2
2013
5
2012
2
2011
5
2010
3
2009
7
2008
11
2007
18
2006
1
2005
2
2004
7
2003
7
2002
5
2001
2
2000
3
1999
5
1998
2
1997
6
1996
4
1995
2
1994
2

What owners say

Filed Nov 7, 2026 · Engine · FL

On October 20th, 2026, I was driving the vehicle (a 2020 Tahoe with 74081 miles on it) in highway traffic at approximately 55 mph when with no warning an engine message lit up as the vehicle had a sudden loss of power. This put myself and others at risk of a serious crash.

Filed Jul 22, 2026 · Transmission · NC

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

Filed Apr 7, 2026 · Engine, Transmission · NY

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)

Filed Mar 18, 2026 · Electrical, Steering · CA

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.

Filed Jun 8, 2025 · Brakes, Electrical · IL

My 2020 Tahoe stabilitrak has gone off approximately 5 times over the past 2 months April and May of 2025 in one incident my vehicle did turn off all incidents were at low speeds less than 5 MPH. Four of the incidents the stabilitrak light turned on and an audible beep, I also lost power to my steering and breaks. When I had the oil change the service Tec at the dealer stated they can not test it unless the light WAS on? Has anyone reported or experiences this issues What can be done to fix this issue. Please email me at [XXX] if you have any questions or helpful hints. Thanks [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)