2021 Chevrolet Tahoe Problems

Half of the owners who gave a mileage had the problem by about 59,000 miles.

What to check before you buy

• Ask the seller not to warm the car up, and start it cold. Listen for ticking, knocking or a rough idle in the first minute.
• Pull the oil dipstick and the oil cap. Low oil, a gasoline smell or a milky film on the cap are reasons to walk away or get an inspection.
• Plug in an OBD2 scanner. Stored or pending codes matter, and so do readiness monitors that show "not ready", which usually means the codes were cleared right before the sale.
• Ask for oil change records. A gap in the records on a model known for engine complaints is a negotiating point at minimum.

Tools that help

What owners said

Driving on the highway when all lights lit up on the dashboard. Car slowed down immediately following alert notifications. Towed to dealer. Was told I needed Camshaft and both banks of lifters all head bolts and head gaskets (W) [Other]: Camshaft actuator and bolt and chain tensionerOwner complaint, filed 2026

The vehicle suffered complete internal engine failure due to a snapped timing chain on startup. The vehicle turned over via the starter motor but failed to start. A professional diagnosis confirmed the broken timing chain caused extensive valve-to-piston damage, requiring a full engine replacement. This failure appears to be a direct…Owner complaint, filed 2026

Half of the owners who gave a mileage had the problem by about 39,000 miles.

What to check before you buy

• Smell around the engine bay and under the rear of the car for raw fuel.
• On the test drive, accelerate firmly from a stop and up a grade. Stumbling, surging or a flashing check engine light are red flags.
• Fuel pump recalls are common. Check this exact VIN for open recalls before you buy.

Tools that help

What owners said

Fuel pump control module failed at under 60k miles. No parts in stock and was told by dealer, no parts anytime soon. This is unacceptable, especially since this is a known problem. A rental car should be provided as expected wait time is now going on two weeks.Owner complaint, filed 2026

While driving down interstate at approx. 55-65mph, vehicle "sputtered" and shut off while driving. Vehicle would crank but not start. After sitting approx. 10 mins, was able to restart and drive approx. one mile or less before "sputter" and vehicle died, followed by another crank no start. No check engine lights came on. Vehicle was in…Owner complaint, filed 2026

Half of the owners who gave a mileage had the problem by about 62,000 miles.

What to check before you buy

• Drive it from cold if you can. Shifts should be smooth in every gear, including reverse.
• Feel for slipping (revs rise without the car speeding up), shudder at low speed and a delay when you put it in gear.
• Listen for whining, which is a common CVT complaint, and clunks when you go from drive to reverse.
• If it has 4WD or AWD, engage it on the test drive and ask when the transmission and differential fluids were last changed.

Tools that help

What owners said

My car on the dash board said do not accelerate and was shaking and the gear would not go into reverse. When I tried the car would not move. I towed the car to local Chevy dealer and when I told them about N242454441 or related safety campaigns like N242454440 nothing came up for my VIN but was informed GM had this program specifically…Owner complaint, filed 2026

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at various speeds uphill, the vehicle made a loud clunking sound while downshifting. While driving 70 MPH on one occasion, and while driving 20 MPH on another occasion, the vehicle made a loud clunking sound while downshifting and lost motive power, prompting…Owner complaint, filed 2026, at 76,000 miles

Half of the owners who gave a mileage had the problem by about 37,000 miles.

What to check before you buy

• Test every switch: windows, locks, mirrors, seat heaters, the screen, the backup camera, Bluetooth and every USB port.
• Watch the dash at startup. Every warning light should come on briefly and then go out.
• Have the battery and charging system tested. A weak alternator or battery drain shows up here.

Tools that help

What owners said

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, there was a breach in communication with the OnStar system. The contact believed that the brakes failed, and several other safety systems became inoperable due to a failure with the OnStar system. The dealer was notified of the…Owner complaint, filed 2026, at 114,000 miles

The sound in my entire truck goes in and out. Even my blinker signal does not make sound and I have to look down to ensure my blinker is on which could lead to an accident.Owner complaint, filed 2026

Half of the owners who gave a mileage had the problem by about 37,000 miles.

What to check before you buy

• The air bag (SRS) light should come on at startup and go out within a few seconds. If it stays on, the system may not work in a crash.
• Air bag recalls are some of the most serious. Check this exact VIN for open recalls and get proof any recall work was done.

Tools that help

What owners said

I received an automated message from the vehicle stating to service the safety restraint system. I took the car to the local dealer and they ran a diagnostic review. There is a TSB for the vehicle and they say that the problem is coming from the overhead console part number 86575239. This part is not available anywhere. I contacted…Owner complaint, filed 2026

The contact owns a 2021 Chevrolet Tahoe. The contact stated that the air bag and SRS warning lights were intermittently illuminated. The vehicle was taken to a dealer and the battery was replaced; however, the failure persisted. The vehicle was taken back to the dealer, where it was diagnosed and determined that the front passenger’s…Owner complaint, filed 2026, at 67,000 miles

Half of the owners who gave a mileage had the problem by about 10,000 miles. Parts named most: Warnings (17).

What to check before you buy

• Where it is safe, try the adaptive cruise and lane keeping on the test drive and watch for sudden braking or warnings with nothing there.
• Check the windshield in front of the camera and the bumper sensors for cracks, chips or poor repairs.
• Ask whether the windshield has been replaced. The camera has to be recalibrated afterward, and many shops skip it.

Tools that help

What owners said

The contact owns a 2021 Chevrolet Tahoe. The contact stated that after coming to a stop, upon depressing the accelerator, the vehicle experienced phantom braking. The contact stated that the Forward Collision Avoidance warning light illuminated, and the vehicle inadvertently stopped with no vehicles or objects nearby. The contact stated…Owner complaint, filed 2023, at 8,500 miles

The contact owns a 2021 Chevrolet Tahoe. The contact stated while driving 65 MPH, the vehicle experienced phantom braking and stopped suddenly. The adaptive cruise control warning light was illuminated. The contact stated that after several minutes the vehicle started operating normally. The vehicle was taken to the dealer however, no…Owner complaint, filed 2023, at 10,000 miles

Half of the owners who gave a mileage had the problem by about 50,000 miles.

What to check before you buy

• The pedal should feel firm and the car should stop straight without pulling, grinding or a pulsing pedal.
• The ABS and stability control lights should go out after startup and stay out.
• Look through the wheels at the rotors. A deep lip on the edge means brakes are due soon, which is a fair thing to negotiate on.

Tools that help

What owners said

I was driving home after dropping my kids off at school and when I was almost home my dash lit up with the traction control light, check engine light, ABS light, red break light, service ESC message, forward collision system unavailable message and break system failure 62 MPH top speed ( was switching between 43 MPH top speed and 62 MPH…Owner complaint, filed 2026

I have had the break pads and rotors replaced and in the shot over 6 times with them still not fully functioning correctly. I finally gave up on them and still expected to pay again. I don’t feel like this car is safe and have had nothing but issuesOwner complaint, filed 2025

What to check before you buy

• Pull out and latch every seat belt, and let each one retract on its own.
• Try every seat adjuster, and watch for a passenger air bag "off" light when an adult is in the seat.

Tools that help

What owners said

The head rest in the third row seat is broken and will not remain in the up position when the seat is up. This is causing a safety risk in that there is no safety for passengers in a rear end collision. There is already a recall that Chevrolet has issued for other Tahoe vehicles; however, my VIN number has not been added to that recall.…Owner complaint, filed 2025

My vehicle is experiencing the same issue with the Third Row Headrests as outlined in a prior service bulletin (N202316750) for the same model year and make vehicle. My VIN number was not included in the bulletin, but I believe it should have been. The passenger side third row headrest will no longer stay up when the seat is engaged.Owner complaint, filed 2025

What to check before you buy

• Check every light: headlights on low and high, fog lights, brake lights, turn signals and reverse lights.
• Run the wipers on every speed with washer fluid, and run the defroster front and back.

Tools that help

What owners said

I am writing to report a serious safety defect regarding the Driver's Side LED headlight assembly on my 2021 Chevrolet Tahoe (VIN: [XXX]. While driving, the headlight suddenly dropped completely out of alignment and is now pointing directly at the ground, casting light only a few feet in front of the bumper. Upon inspection, it was…Owner complaint, filed 2026

Driver's side headlamp beam direction is out of alignment.The beam is aiming at the ground which is greatly affecting visibility. I have never adjusted or attempted to adjust the headlamps. It has gone out of alignment due to normal driving use.Owner complaint, filed 2026

What to check before you buy

• Turn the wheel lock to lock while parked and listen for groaning, clicking or binding.
• On a straight road the car should track straight with the wheel centered and no loose feeling.
• A power steering warning on the dash, even briefly, deserves a mechanic’s look before you buy.

Tools that help

What owners said

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed and turning the steering wheel, there was an abnormally loud grinding sound coming from the vehicle, and the steering was difficult to turn. The vehicle was driven to a dealer and determined that the vehicle had lost power steering…Owner complaint, filed 2026, at 96,725 miles

At low speeds the steering wheel locks up and become very difficult to turn. This has been an issue for a few years and only happens randomly. Reviewing N212333901 it is the same symptoms but for some reason my VIN is not covered in the recall while is the same year as affected vehicles (2021 Tahoe Z71)Owner complaint, filed 2025

What to check before you buy

• On the test drive, press the gas gently and firmly. The response should be smooth with no lag or surge.
• Set the cruise control, then use resume and cancel to make sure each one works.

Tools that help

What owners said

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while driving and attempting to slow down to approximately 35 MPH, there was an abnormal clunking sound coming from the vehicle. The contact believed that the sound was caused by ice buildup on the mud flap, but shortly afterwards, the engine revved unexpectedly, with the…Owner complaint, filed 2026, at 88,342 miles

On the morning of 1 Oct, I had left the house here in Cedartown GA to head to a meeting in Atlanta with a customer. I had started the truck 15 minutes before departing just as we have always done to our vehicles over the years to allow them to warm up properly. I departed Doyle Rd onto Hwy 27 South heading towards interstate 20. About 15…Owner complaint, filed 2025

What to check before you buy

• Drive over a few bumps and potholes slowly with the radio off and listen for clunks or rattles.
• Check the tires for uneven wear on the inside or outside edges, a sign of alignment or suspension trouble.
• Look behind the wheels for oily, wet shocks or struts.

Tools that help

What owners said

The contact owns a 2021 Chevrolet Tahoe. The contact stated that while turning left or right, there was a grinding and scratching sound coming from underneath the front-end of the vehicle. The vehicle was taken to the dealer to be diagnosed and the contact was informed that the wheel was rubbing against the wheel well. The dealer…Owner complaint, filed 2023, at 32,000 miles

I’ve been dealing with an alignment issue since last June when I took in my 2021 Tahoe z71 with air ride suspension. It’s chewed up the stock tires at just 25,000 miles. It’s came out of alignment 3-4 times since then and Chevrolet is doing nothing about it. I’ve spoke with others that have the same vehicle and the same problem. I just…Owner complaint, filed 2023

What to check before you buy

• Look underneath with a flashlight. Utah road salt is hard on frames, brake lines and the bottoms of doors.
• Open and close every door, the hood and the liftgate, and lock and unlock each one.
• Use a paint thickness gauge and compare panels. A panel that reads very differently from the rest has likely been repaired.

Tools that help

What owners said

Sunroof continues to collect water in the drain. I have had it blown out but it continues to happen. It is a matter of time before it begins to leak into the truck. In my research, this is an extremely common problem/design flaw.Owner complaint, filed 2024

There is a serious cabin air pressure issue in this vehicle. When driving at any speed with the windows up, there is a booming inside the cabin, as if the passengers are inside of a subwoofer. My theory is that the headliner panel has too much flexibility in it due to the ceiling air vents. When driving, it is likely the headliner is…Owner complaint, filed 2021

What to check before you buy

• Read the four-digit DOT date on each tire. Tires older than about six years should be replaced, whatever the tread looks like.
• Check tread depth on all four. On AWD vehicles all four tires should match.
• The tire pressure light should go out after startup.

Tools that help

What owners said

The contact owns a 2021 Chevrolet Tahoe equipped with Good Year Tires, Tire Line: Wrangler Trail Runner AT, Tire Size: 275/60/R20, and DOT number [VIN]. The contact stated that while entering her driveway, the driver's side front tire, wheel, and hub detached from the vehicle and crashed into an unknown parked vehicle located in the…Owner complaint, filed 2024, at 14,200 miles

GM does not install TPMS devices in spare tires. I had a flat tire in snowy conditions 100+ miles from the nearest place for assistance. After putting on the spare tire the DIC (driver information center) displayed no air in tire. That’s because a TPMS doesn’t exist in spare tires. I started driving a my four wheel drive turned off. I…Owner complaint, filed 2025