2021 Chevrolet Tahoe electrical problems
56 of the 453 complaints owners filed with NHTSA about the 2021 Chevrolet Tahoe name the electrical system (NHTSA’s “Electrical System” heading — wiring, modules, batteries, charging, infotainment and driver displays — NHTSA's broadest heading). Filed under the same heading: 397 manufacturer bulletins, 1 recall. Every figure below is a document in a federal file, linked; none is a failure rate, and none is a verdict on any one car.
What owners filed about the electrical system
Source: NHTSA complaint database1 of the 56 reports a crash · 2 a fire · 3 injuries. Self-reported, unverified.
Filed per year: 2020: 2 · 2021: 5 · 2022: 3 · 2023: 9 · 2024: 12 · 2025: 16 · 2026: 9
Too few of these complaints carry an odometer reading to say when the problem shows up.
453 complaints in all about the 2021 Chevrolet Tahoe, 9 filed in 2026. The whole picture, every system →
Counts are owner reports to NHTSA, not verified defects, and scale with how many of these were sold; nothing here is a rate. NHTSA groups complaints coarsely, so “Electrical System” means the same area of the vehicle, not one fault.
Across model years: Chevrolet Tahoe electrical problems, every year on file →
In owners’ own words
Source: NHTSA complaint databaseFiled with NHTSA by the people who own these cars, about the electrical system. Quoted as written, with anything identifying removed; unverified reports — what was said, not a finding that it was true.
I was driving the vehicle and it suddenly lost power - going from 55 MPH down to 0 then the engine just stopped. No warning lights went off, no stalling, no engine noise- completely lost power. Would not start after that for 20 minutes. Started after 20 minutes- and ran fine -like nothing happened.
My tahoe has shut off several times. I am sometimes at a red light and it shuts off and won't turn on or itll eventually turn off but it has a ton of errors on the screen. This has happened about 6 times. Today, April 6th, it wouldn't even start. It has started at the dealership but the screens are blacked out.
While driving in traffic the car shut off, engine stopped. When the car stopped it went into park. Could not restart the car. Starter worked and engine started but ran very rough then stopped several times. I could not completely shut off the car in an attempt to basically reboot. Car had to be towed to the dealer
Received an Over-the-Air update that rendered my vehicle unless. My vehicle would no longer start, or power on, or power on in accessory mode. It was stuck in Park, the electronic Parking Brake could not be disengaged, the door locks could not be operated and left unlocked, no lights, no warning lights, the emergency lights did not…
The dashboard for the vehicle loses all power and does not regain power/connectivity. I've had this problem "fixed" 5 times by the Chevy dealership and the issues continues. They've replaced the entire dash, checked electrical components, changed out the electrical bank, and the issues continues.
What is on file about the electrical system
Source: NHTSA recalls, investigations and manufacturer communicationsRecall filed under this heading
- 21V421000 ModerateJun 10, 2021 · 285,622 vehicles
- General Motors, LLC (GM) is recalling certain 2021 Buick Envision, Cadillac CT4, CT5, Escalade, Escalade ESV, Chevrolet Tahoe, Corvette, Suburban, GMC Yukon, Yukon XL vehicles. The communications gateway module incorrectly processes a loss of communication with the sensing diagnostic module (SDM), causing the air bag malfunction indicator light to inconsistently illuminate.
397 manufacturer bulletins filed under this heading
The 0 newest are listed; every one is on the model year’s page. Quote the document number at a service desk — it is a diagnosis the maker has already written down.
Trouble codes named on this system
B14DC P129F P12A6 B1A7A U1121 U3000 P023F P2714
Codes a bulletin or an owner’s complaint about the 2021 Chevrolet Tahoe names on this model year; a code with a record of its own links it.
Other systems with a record on the 2021 Chevrolet Tahoe
Source: the same files- engine problems 185 complaints
- fuel system problems 117 complaints
- transmission and drivetrain problems 88 complaints
Common questions
Source: NHTSA complaint database, recalls and manufacturer communicationsAre electrical problems common on the 2021 Chevrolet Tahoe?
They are documented: NHTSA holds 56 owner complaints naming the electrical system on this model year (12% of everything owners filed about it), and 397 manufacturer bulletins, 1 recall are filed under the same heading. Whether it is a problem on one particular car is a diagnosis, not a count, and a count says nothing about how many were sold.
Is there a recall for the electrical system on the 2021 Chevrolet Tahoe?
Yes — one campaign is filed under this heading: 21V421000. A recall is matched by VIN; check yours at nhtsa.gov/recalls.
When do electrical problems show up on the 2021 Chevrolet Tahoe?
Too few of the complaints carry an odometer reading to say. The model year's page shows the mileage curve across every system where it can.
What does NHTSA's "Electrical System" heading cover?
Wiring, modules, batteries, charging, infotainment and driver displays — NHTSA's broadest heading. Owners choose the heading when they file, so it says which area of the vehicle the complaint is about, not which part failed.