Chevrolet Suburban Complaints (2020)

44 consumer complaints on file.

#11658666May 3, 2025
ENGINE
Complete engine failure. Entire engine needed to be replaced. Only 5 cylinders were working causing the vehicle to shake and shudder violently
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657746April 30, 2025
ENGINE, FUEL/PROPULSION SYSTEM
Out of the blue, while driving, my car started lurching and making a weird rattling noise. I was able to make it to a mechanic, where I learned the cylinder lifters collapsed and crankshaft were broken. The mechanic told me this is a common defect for GM motors. My vehicle is only five years old, so to learn we have a $10-20,000 repair on our hands was paralyzing and devastating.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11657853April 30, 2025
POWER TRAIN
Driving on the highway and I started to slow down even while pressing the accelerator. Pulled over and turned the car off and then back on. I was able to almost get to an exit but then it completely stopped moving. Turned it off and on again but car would not move. Not a single light turned on until the last time I attempted to move the car. Had it towed to Chevy dealer and transmission was completely out. Had 2 different mechanic places (dealer and private) tell me that it is extremely common once a 2020 suburban hits around 100k miles. That is completely irresponsible of GM to not put something out so that owners can at least have knowledge that there could be a potential problem. No warning signs, no lights on that is an accident waiting to happen and a potential wrongful death lawsuit coming your way if something isn’t put out.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11645902March 3, 2025
ENGINE, ELECTRICAL SYSTEM
engine replacement at 120,000 miles. I was told by Mechanic that the 2020 Suburban's have a problem with the fuel injector wiring harness dry rotting and the sensor changing the engine from V8 to V6 when on highway going bad causing misfire in engine and ruining the engine.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11640868February 5, 2025
POWER TRAIN
The contact owns a 2020 Chevrolet Suburban. The contact stated while driving 10 MPH and depressing the accelerator pedal, the vehicle failed to respond as needed. No warning lights were illuminated. The contact pulled over and turned off and restarted the vehicle however, the failure persisted. The contact stated that the dealer was contacted. The vehicle was towed to a dealer and was diagnosed with transmission failure. The contact was informed that the transmission needed to be replaced. The vehicle was not repaired. The VIN was not included in NHTSA Campaign Number: 24V797000 (POWER TRAIN). The manufacturer was notified of the failure but offered no assistance. The failure mileage was 93,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11623855November 6, 2024
POWER TRAIN, ENGINE, VEHICLE SPEED CONTROL
On October 27, coming back from a family trip at 10 PM at night on a major highway, the suburban all of a sudden quit. Traveling at 70 miles per hour, all of a sudden, when pressing the gas pedal, the car would not accelerate and the RPM gauge was erratically moving. The car started to slow down till it eventually just quit and it would not go anymore. We were stranded in the middle of the highway with cars coming and going both ways. It was scary, it was dark, and dangerous. A tow truck was called and they told the suburban to a Chevrolet dealership 60 miles away. The following day, the dealership informed us that the transmission was not repairable and that they had found metal pieces in the transmission. They informed us that the only way to repair was to replace with a new transmission. They informed us that these transmissions are faulty and that it’s common for them to replace transmissions in suburbans about twice a month. We were not happy to find this out because this is the second transmission in a second Suburban that we have owned that we have had to spend $12,000 on between both vehicles. The car was out of warranty, Therefore, the expense was totally on us. I need help trying to see if I can get reimbursed for these expensive faulty transmissions that are not our fault! We have serviced car when due. There were 4 small children in the car and we could’ve had a tragic accident because car quit suddenly! Please help!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11622672October 30, 2024
STEERING
The contact owns a 2020 Chevrolet Suburban. The contact stated that while driving at an undisclosed speed, the steering wheel became firm. There was no warning light illuminated. The contact stated that the steering wheel returned to normal operation upon depression of the brake pedal. A week later while the contact's husband was driving at an undisclosed speed, the steering wheel became firm again, and there was no warning light illuminated. The contact stated that recently while driving 50 MPH, the "Service Power Steering - Drive with Care" message was displayed. Neither the dealer nor the manufacturer was notified of the failure. The vehicle was not yet diagnosed or repaired. The failure mileage was approximately 55,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11612983September 6, 2024
ENGINE
I put vehicle in Chevy dealership 7/8/24 for cold start knocking sound. Dealers called 2 days later said it was defective lifter issue on the 6.2 liter GM engine.Dealer ordered new engine.on 8/23/24 while test driving vehicle with new engine in it while driving on the highway a fire started under the engine. I was told by dealer that people were telling the driver the vehicle was on fire. He abandoned the vehicle on the highway as it burned up inside and outside. Fire trucks put the fire out.Vehicle is total loss. Waiting two weeks for GM to tell me what they will do to help me. No reply to phone calls or emails unless I call them to check and find out what is going on. I wrote email to GM CEO and no reply. Insurance for me offered me pay out of current value. GMis supposedly going to investigate the vehicle and the cause of fire. Lifter issue is widespread on these engines. Many lawsuits. Vehicle is still in dealer lot burned up waiting for gm to investigate it. I am getting no resolution from GM to help me fully recover from this with new vehicle. If no one had told mechanic that vehicle was on fire who knows if he would have gotten out safely before engulfed in flames. I could not upload additional photos due to site no working.
Crash:
No
Fire:
Yes
Injuries:
0
Deaths:
0
#11597042June 26, 2024
POWER TRAIN
Engine making ticking on passenger side when first started in the morning. Service bulletin is out but dealers are not doing a recall. Engine can fail while driving from this if it gets worse. GM admitted problem in Service Bulletin No 19-na-218 lifter and push rod failure is the problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11590849May 26, 2024
ENGINE, FUEL/PROPULSION SYSTEM
Fuel injector failed and pumped too much gas into cylinder causing gas to get into engine oil and ruin engine. GM claims they are building the replacement engine, but won't give any estimate of when it will be fixed. Other dealers that are receiving these engines will not sell the engine to my dealer. I believe there is a bigger problem that GM will not admit to and they should be held accountable. Four months is too long for this situation to exist!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11589356May 17, 2024
POWER TRAIN
I had to replace my rear differential due to grinding and metal shavings in the rear end. Recently had to take my truck in for repairs due to the motor mounts breaking. Discovered the front differential is also damaged with metal shavings due to grinding. The auto shop reached out to the local Chevy dealership to order the part to place. Was told the front diff is on back order due to this being a common problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11547712October 2, 2023
VISIBILITY/WIPER
When putting vehicle in reverse, the screen for the rear camera will go to full intensity brightness. There is no adjustment for this, as the dashboard lights do not control the screen brightness. It is impossible to see out of the Sideview mirrors with the windows up due to the reflection off of the windows. This is amplified even worse when it is raining at night. GM had a recall for this problem on the previous generation Suburban, and it was corrected by a software update. I have had it at the dealer twice since buying it in June. They have confirmed the issue, but state that GM says this is normal. You shouldn't need to roll down windows at night in order to see out of your mirrors. When the vehicle is taken out of reverse, the camera will dim down to an appropriate brightness, but that is when the vehicle is in Drive, and the screen returns to normal layout. There are numerous complaints on this specific generation vehicle on multiple forums across the web.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11522047May 15, 2023
STEERING, ELECTRICAL SYSTEM, SERVICE BRAKES
My car shut off two times while driving. When you google the issue, it auto populates meaning that this is a very common issue with GM. It starts back to 2015 searches as well. GM needs to recall their suburbans for their cars turning off while driving which caused me to lose power steering, power brakes and anything that requires electrical.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11514201March 28, 2023
ENGINE
The water pump burst without any warning.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11459164March 31, 2022
SERVICE BRAKES
Total Brake failure without warning, DTC, or messages. Coming out of a parking lot applied the brakes and the brake pedal went to the floor and was not able to stop. I tried pumping the brakes which pedal to return to the correct position but went back down to the floor. Had the vehicle towed to the dealer which confirmed the truck needed a new master cylinder, brake booster, and vacuum pump.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11436874October 15, 2021
ENGINE AND ENGINE COOLING
The contact owns a 2020 Chevrolet Suburban. The contact stated that while operating the vehicle a banging noise was present coming from the engine compartment. Additionally, while driving, the cluster gauges and the air conditioning malfunctioned. The vehicle was later examined by an independent mechanic who diagnosed that the water pump had failed. The vehicle was towed to the local dealer but not repaired. The manufacturer was not notified of the failure. The failure mileage was 30,000.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11433233September 16, 2021
SERVICE BRAKES, FUEL/PROPULSION SYSTEM
Have had starter problems since we purchased the vehicle. Starter intermittently loudly grinds when pressed 2-3 times a week and won’t start. Dealership could repeat problem once, but never fixed it. Took vehicle in at least half a dozen times. Never fixed. Car also makes an odd humming when gas is applied. This week, car started and died after driving a foot. Then car wouldn’t start at all. Brakes stiffened up and wouldn’t compress without substantial effort. Everything resolved on its own within 30 minutes. But the very next day, pulled inti position in our alley to back our Suburban into the garage. Put car in reverse. While using the back up cam (that came on like normal when car is in reverse), i applied gas. The car didn’t respond at all (didn’t even rev like what happens when you apply gas while car is in neutral). I applied a touch more gas and car all of a sudden lurched forward with the full force of a V8 engine being floored. I tried to slam on the brakes, but the brakes wouldn’t respond in such a way that i thought my shoe must have gotten stuck. It hadn’t. The brakes did not work. I don’t know how long it would have taken to finally stop because we only had 5 feet to go before we slammed into our neighbor’s house (which is what stopped our vehicle). Car is not drivable and I wouldn’t drive it if it were. It is available for inspection. Will be towed once scheduled.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11424349July 12, 2021
STEERING
While turning at driving speed I feel as if I loose control of the steering for a split second. The front wheels feel like they begin to turn without me turning the steering wheel. This has happened at least a dozen times in the 6000 miles I have put on the car. It is extremely dangerous especially on wet roads. I have not reported this to GM. I was searching the internet for a recall and found your website.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11366418October 26, 2020
WHEELS
TL* THE CONTACT OWNS A 2020 CHEVROLET SUBURBAN. THE VEHICLE WAS PREVIOUSLY MODIFIED WITH HUTCHINSON WHEELS. THE CONTACT STATED WHILE DRIVING AT A SLOW SPEED, THE FRONT DRIVER'S SIDE WHEEL DETACHED WITHOUT WARNING. THE VEHICLE WAS TOWED TO AN UNDISCLOSED LOCATION. THE LOCAL DEALER WAS NOT CONTACTED. THE VEHICLE WAS NOT DIAGNOSED NOR REPAIRED. THE MANUFACTURER WAS CONTACTED HOWEVER, NO FURTHER ASSISTANCE WAS PROVIDED. THE FAILURE MILEAGE WAS 500.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11349569August 15, 2020
VEHICLE SPEED CONTROL
WHEN ADAPTIVE CRUISE IS ENGAGED, THE SYSTEM HESITATES WHEN LEAD VEHICLES SLOWS AT A SLOW RATE (NO BRAKE LIGHTS OBSERVED ON LEAD VEHICLE), REQUIRING OPERATOR TO APPLY BRAKES. WHEN ADAPTIVE CRUISE CONTROL IS ENGAGED DURING HIGHWAY DRIVING, INTERMITTENTLY, MEDIUM SLOWING OF LEAD VEHICLE (BRAKES APPLIED) THE VEHICLE DOES NOT REACT IN TIME TO AVOID COLLISION WITHOUT ACTIVE AND HEAVY BRAKE APPLICATION (JERKING DRIVER AND/OR PASSENGER) TO AVOID COLLISION. ABOVE 65 MILES AN HOUR THE ADAPTIVE CRUISE CONTROL DOES NOT LEAVE ADEQUATE DISTANCE BETWEEN VEHICLE AND LEAD VEHICLE. I FIRST NOTICED THIS IMMEDIATELY UPON FIRST LONG DISTANCE DRIVE. THIS IS AN ONGOING PROBLEM. HAPPENING FREQUENTLY BETWEEN JULY 4TH AND JULY 12. SINCE THE JULY 12 THE CAR HAS NOT BEEN USED FREQUENTLY IN SITUATION WHERE THE CRUISE IS USED REGULARLY. HOWEVER DURING THE FEW TIMES ON THE HIGHWAY BETWEEN JULY 12 AND NOW, THE PROBLEM HAS REOCCURRED.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

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