Vehicle began having issues at 3 months old... Random service messages, defective headlight, wierd engine noises at startup and stalling upon acceleration/deceleration. I took it to the dealer several times about the issues I were having but they always say they aren't able to replicate any issues. 3 months later I was driving on the highway and the engine started knocking. Had it towed to the dealer and it took them 6 months to replace engine, tcm, starter, and other parts. After finally getting the truck back, it was still stalling and there was a check engine light... Dealer did not reassemble the vehicle properly and several parts and bolts were still missing. It went right back in the shop and catalytic converters were replaced. I also mentioned missing parts and bolts. I get the truck back again and it still seems like it wants to stall. I was turning into a parking lot a few days later and it seemed like it wanted to cut off. While I was distracted trying to see if the truck cut off, I hit a small pole... Truck was damaged way more than it should have been because the dealer did not reassemble it properly. Body shop said my bumper was only held on by 2 bolts and several other bolts and pieces were missing. They said if my bumper was attached properly the damage would not have been as bad. The vehicle was already unsafe because of stalling and the dealer made it structurally unsafe as well... I have opened cases with gm and they aren't doing anything about it. Here this truck is 14 months old and it's been in their possession more than mine... I have asked them about replacing the vehicle and they insist on fixing the issues but never do and I end up driving an u safe vehicle around.

- Meridian, MS, USA

Add 1 more victim to the ongoing and growing list of GM owners of vehicles with 5.3/6.2Lmotors with DFM lifter failure. 50 miles after returning from a 500 mile trip from N. Wisconsin fishing trip this motor threw in the towel. Dealer assessment cylinder #6 lifter failure with an extra bonus of damage bad enough to require replacement of entire cylinder head! This motor has 11K. miles on it, and I have had oil changed multiple times as I am old school and don't buy into the whole 7500K. thing. Guess I should have saved my cash for something more fun! Check engine light did not come on till almost 2mi. after vehicle started running badly, flashing check engine light did not come on till I was almost home 15 mi. Had it towed to the dealer on my own dime!

- Schererville, IN, USA

Vehicle engine has experienced engine lifter failure at 28,000 miles. Engine began shaking violently, check engine lights flashing, traction control light, and stability control lights all came one while driving on the highway several hours away from home. Vehicle had to be towed by Chevy roadside assistance to the nearest dealership. Chevy dealership inspected and said they have to order new lifters for my engine and it would take several weeks for repair.

- Brandon, FL, USA

The 2021 silverado v8 randomly started making a knocking noise. The steering wheel would shake randomly as I accelerated and stayed above certain speeds. I-??m barely able to drive slowly residential speeds at most. If I drive any faster I-??m worried for my safety that the car while break down in the middle of a busy road posing a danger to my family and those around me. I-??m not sure if this is a lifter issue, or engine issue but it seems to be a widespread issue that I haven-??t recurved any recall notice for.

- Phoenix, AZ, USA

There is a massive shudder that sounds like the whole dash could come loose. feels and sounds like rumble strips and off road driving mixed all together. It happens at all speeds and when rpms are steady around 1200-1400.

- Ozark, MO, USA

I have a 2021 Silverado 6.2 being repaired for failed lifters. I see this is a common trend and can cause hazards when pulling over for a faulty motor. 10 speed Transmission downshifts from 2 to 1 harsh with rpms jumping up causing for me to apply more brake pressure to stop. I have had a few incidents when I get close to the vehicle in front coming to a stop. I have taken vehicle to dealer for issue and they couldn-??t replicate issues. Check engine light has popped up once or twice but never stayed on long enough to throw a code.

- San Antonio, TX, USA

Engine valve lifter failure at 20,000 miles; engine hesitation and power loss. Error to parking brake and to electronic stability control. Chevrolet to replace damaged lifter but refused to replace both banks of defective lifters. As a result of dysfunction I was stranded 1200 miles from home and have been waiting 2 weeks for repair. Still 1200 miles from home with 2 kayaks, 2 bikes etc.

- Corvallis, OR, USA

Driving down the road and out of know where engine starting knocking and lagging, idled rough. Drove to dealer lifter failure was what was diagnosed. 10000 miles on the truck driven easy, no towing or anything. Dealer also informed me 3 other silverados were there for the same problem! Ridiculous!!

- Fernandina Beach, FL, USA

Driving the vehicle on October 10, 2021, with my fiancee and her mother in the vehicle. Upon exiting expressway I-75 a noise in the front end could be heard. It was a pinging/clinking noise that didn't change in frequency under braking nor under speed changes. It stayed at the same frequency of occurrence regardless of speed but wasn't present at vehicle stop or idle. It seems only to happen when vehicle is in motion. The noise became louder at lower speeds of driving. Vehicle was taken to a GM dealership on October 11, 2021, for repair. The dealer indicated that they could not repair the vehicle as GM issued a work instruction (PIP5653) stating no repair or resolution is available. GM indicates there is no problem to the vehicle however something is wrong with the front end axle and if it breaks then there is risk of accident as the wheel could lock up causing loss of control and/or loss of steering. Upon reading document PIP5653 I learned that all GM full size pick-up trucks and SUVs from model year 2019 to 2021 are effected. This is a huge population at risk for possible loss of control and/or loss of steering to be supported by simple GM comment. There must be a fix.

- Clawson, MI, USA

while stopped, engine running, in gear, foot on brake the truck lurched forward approx 2-3 feet. when i tried to pull forward the engine was revving a much higher rpm's. moved down road approx. 1-2 miles, tried to turn around to return to a dealer near by and truck would not go into reverse...on-star reported to get engine/transmission service soon. reported to dealer, they checked the (code)? truck continued to run well....till it happened again....now it has happened a third time dealer has ordered parts to try to correct. dealer is trying, but no one seems to know what to do...

- Polson, MT, USA

Driving along a highway at 65mph and a lifter dropped or rocker arm failed catastrophically. Loud audible pops and bangs without warning no "warning lamps" lights or notifications at all. Towed it to dealership under their recommendation as opposed to driving it there. Also there's a clicking metallic jingle jangle in the driver side from unless 4wheel auto is engaged.

- Lyndonville , NY, USA

Upon first start with 6-8 hours of being parked, the first shift from gear 1 to gear 2 has a massive hesitation that cause all passengers to lurch forward. It has not caused in issues for the quiet street we live on but in a high traffic area it would effect safety of entering into traffic. This issue happens every morning.

- Columbus, IN, USA

The lifters in the truck are failing, a brand new truck 12,000 miles on it and the lifters have failed. Which is also leading to an oil problem. They are trying to only fox one bank of lifters instead of replacing both. Due to them wanting to wait until the fail. They have known about the problem and i bought the truck from them not knowing that the engine was a faulty engine. When you pay 70,000k for a truck you are expecting it to last a lot more than 6 months. Which is also causing the bent pushrods on the truck. I bought the truck brand new at the end of January, for the lifters to fail, valve springs, and for bent pushrods, I-??m estimated to be out of my truck for the next 3/4 weeks which would bring it close to lemon law

- Myrtle Beach , SC, USA

Faulty lifters causing the truck to throw piston rods. This causes malfunction of the traction control, parking brake, transmission, auto locking rear differential. I have had my truck in the shop 3 times for the same issue all within the 1st 10,000 miles. This particular motor has been taken out of production. Upon speaking to mechanic managers at multiple GM dealerships they were not surprised and personally gave me advice on the lemon law. My truck, which is my 1st brand new vehicle, has been out of service now for a total of 45days. I have still made payments up to date. The dealership offers a car or small suv while repairs are being completed, not a truck! Beware of the 5.3litre ecotec3 v8 motor.

- Deltona, FL, USA

Wife was headed to town when the truck started bucking and surging then leaving her stranded along side the road. NO MIL on until 5 mins after the bucking and surging started. called GM and basically said oh we will just fix it. Didn't care since we were able to start it back up and drive it home and then have it towed to the retailer next day. Truck has 6000 miles on the odometer. GM knows they have an issue as Service manager explained tech tips they have on this truck.

- Darlington, IN, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving off from being stationary, the vehicle stalled without warning. There was no warning light illuminated. The vehicle was taken to smart Chevrolet Cadillac Buick GMC (3 smart dr, white hall, ar 71602, (870) 543-2200) but was not yet diagnosed. The vehicle was not repaired. The manufacturer was informed of the failure however, the contact was still awaiting a response. The failure mileage was approximately 300. The consumer stated the vehicle was repaired. A coil pack was replaced.

- Whitehall, AR, USA

Got cel code P25A2, C2A02, C2A03 3 times now. First time dealership had no idea (Suburban Chevy sandy or), second time they replaced a wheel speed sensor. Now this is the 3rd time and they have the truck for who knows how long... truck gets the cel while driving.

- Sandy, OR, USA

The initial call in for service it was taken in on 12292020/mileage 1020 for a oil change and a clunking noise coming back from the rear end at low speeds, while turning and going over bumps at all speeds. The dealership was able to hear the noise and advised that they cannot find out where the noise is coming from. The dealership advised that they submitted a ticket to GM for the noise. On 03022021/mileage 2797 the truck was taken back into the dealer for the same noise because its getting louder. The dealer again said that they heard the noise but cannot figure it out. They advised that they submitted another ticket with GM waiting to hear back from them they closed out the ticket on 03102021 with no answer from GM. I have also called GM customer service and spoke with on 03102021, and told me to call them back because they had to try and let the dealer resolve the issue and the dealer is waiting to hear from GM. The dealer did advise me that there was a service bulletin for 2020 Chevy 1500 pick ups but nothing for 2021S so they can do nothing yet, the sound sounds like to me that the axels are going to come loose or the suspension is going to drop. I am afraid to drive the vehicle fearful that something is going to come off or the suspension is going to drop if I attempt to tow something. Thus causing pain, injury or death to myself or another innocent party. I am considering taking it to another dealer again to see what they say, but I feel this is safety concern all people who are hearing this noise on their 2021 Chevy pick ups. I also would like to add that this truck has no suspension modifications of any type and is all stock. Thank you for taking the time to look into this. Also attached are the work orders from the Chevy dealership. Thank you again

- New Braunfels, TX, USA

----warning light flashing at 103 miles on vehicle, , dealer reset ----450 miles on vehicle stalling, ,warning lights ECM - engine systemp2635 the engine and transmission system is not performing as expected. An issue has been detected in the fuel management system used to maintain, control and monitor fuel consumption. If the check engine light is flashing, a misfire condition has been detected. A misfire increases vehicle emissions and could damage the emission control system on the vehicle. Please reduce vehicle speed, avoid hard accelerations, avoid steep uphill grades, and reduce any cargo loads such as a trailer. If the vehicle is continually driven with the check engine light on, the emission controls might not work as well, the vehicle fuel economy might not be as good, and the engine might not run as smoothly. This could lead to future repairs. Vehicle was towed to maltbie Chevy and has been there since Feb 24th

- Chateaugay, NY, USA