The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving 70 MPH, there was an abnormal clunking sound coming from the engine compartment, and the contact discontinued driving the vehicle. No warning lights were illuminated. The vehicle was towed to the dealer, who diagnosed a failure with the push rod in cylinder 5. The vehicle was repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); but the VIN was not included. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was 64,000.

- Waukegan, IL, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving on several occasions at various speeds, the temperature gauge remained at hot (Hot) location, with a dinging warning notification. The check engine and "Transmission idle temperature high" messages were displayed. The vehicle was steered to the side of the road each time and turned off for approximately 45 minutes to allow the vehicle to cool down. The vehicle was taken to a dealer where it was diagnosed and determined that the transmission needed to be replaced. The vehicle was not repaired. The vehicle was then taken to an independent mechanic where it was determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 115,000.

- Mckinney, TX, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. VIN tool confirms parts not available.

- Saint Joseph, MO, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 60 MPH, the vehicle jerked, and the contact noticed an unusual clicking sound coming from the vehicle. The accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The vehicle was driven to the residence. The vehicle was taken to the dealer, where it was diagnosed with camshaft failure. The contact was informed that the camshaft needed to be replaced. The vehicle was not repaired. The vehicle had been taken to the dealer twice within a month due to the failure. The manufacturer was made aware of the failure, and a case was filed. The contact had requested a buyback. The failure mileage was approximately 70,000.

- Shreveport, LA, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving 70 MPH, the vehicle made an abnormal knocking sound. The contact exited the freeway and continued driving 40 MPH; however, the vehicle stalled, and several unknown warning lights were illuminated. The vehicle failed to restart and was towed to the dealer, where it was diagnosed that piston #4 valve had seized, causing damage to the push rod. The dealer took the engine apart and replaced the push rod, the valve, and the head gasket. The contact stated that the failure occurred while driving 70MPH. The vehicle was towed to Team Hodges, INC. Chevrolet (2265 M-76, West Branch, MI 48661), where it was diagnosed that piston #8 valve had seized, causing damage to the camshaft. The dealer replaced the valve, the camshaft, and other unknown parts. The vehicle was repaired. The contact related to the failure to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The manufacturer was notified of the failure and informed the contact that the VIN was not included in the recall. The failure mileage was approximately 10,000.

- Flat Rock, MI, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving at various speeds, there was an abnormal metal-on-metal grinding sound coming from the engine. The contact also stated that whenever the vehicle was started, the engine was making an abnormal knocking sound. There was no warning light illuminated. The contact had not taken the vehicle to a local dealer or independent mechanic. The vehicle was not diagnosed or repaired. The contact had received notification of NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The manufacturer was informed of the failure. The failure mileage was approximately 47,000.

- Wilson, NC, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving 65-70 MPH, the vehicle lost motive power and there was an abnormal sound coming from the engine. The check engine warning light was illuminated. The contact was able to pull to the side of the road and turned off the vehicle. The vehicle was towed to the dealer, where it was diagnosed that the engine had failed and needed to be replaced. The dealer determined that the failure was related to NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was not yet available. The dealer informed the contact that the vehicle would be repaired at his expense. The vehicle was not repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure and confirmed that the remedy was not yet available. The failure mileage was approximately 77,455. VIN tool confirms parts not available.

- Hernando, MS, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact received notification of NHTSA Campaign Number: 25V274000 (ENGINE AND ENGINE COOLING); however, the part to do the recall repair was not yet available. The contact stated that while driving 70 MPH, the vehicle experienced a loss of automotive power before the engine seized. There were no warning lights illuminated. The contact attempted to restart the vehicle; however, the vehicle failed to restart. The contact stated there was an abnormal burning odor coming from the engine. There were no warning lights illuminated. The vehicle was towed to the dealer, where the vehicle was diagnosed that the rod bearings had failed and damaged the engine. The contact was advised that the engine needed to be replaced. The contact stated that the engine and battery were replaced. The contact stated that on a separate occasion, while driving 70 MPH, the vehicle experienced a loss of automotive power before the engine seized. There were no warning lights illuminated. The contact was able to coast to the side of the road. The vehicle was towed to a local dealer. The vehicle was not diagnosed. The contact towed the vehicle to another dealer. The vehicle was towed to a local dealer where the vehicle was diagnosed, and the contact was informed that the engine was faulty and needed to be replaced. The vehicle was not repaired for the most recent failure. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure. The failure mileage was approximately 27,300. VIN tool confirms parts not available.

- Kingsville, TX, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that the vehicle was making an abnormal knocking sound while driving at various speeds and while idling. There was no warning light illuminated. The vehicle was taken to the dealer, where the engine lifters were replaced; however, the failure persisted. The vehicle was taken back to the dealer, where the contact was informed that the engine abnormal knocking sound was not sufficiently loud to issue a recall. The vehicle was not repaired. The contact related the failure to NHTSA Action Number: PE25001 (Engine, Engine and Engine Cooling). The manufacturer was not notified of the failure. The failure mileage was approximately 11,000.

- Hawley, MN, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that while driving approximately 50 MPH, the engine started rumbling with the check engine, stability-trac, and the parking brake warning lights illuminated. The vehicle was taken to an independent mechanic who diagnosed a misfire in cylinder #1. The mechanic referred the contact to the dealer for assistance. The vehicle was taken to the dealer, who diagnosed that the lift valve had collapsed, and the right side of the block lifters needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure and referred the contact to the dealer for assistance. The failure mileage was 80,000.

- Massapequa, NY, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated upon shifting into reverse(R), the vehicle shut off. The contact stated upon shifting to park(P) to restart the vehicle, the vehicle was able to restart after pressing the Push to Start button several times, and the vehicle made abnormally loud cranking, banging, and rattling sounds. The contact stated that he was an independent mechanic and had determined that the engine was blown, despite the outstanding maintenance record on the vehicle. The vehicle was towed to the dealer, where it was diagnosed that the engine had failed due to lifters failure. The dealer determined that the engine needed to be rebuilt or replaced. The dealer informed the contact that the engine might be replaced because the parts needed for the rebuilding of the engine were on backorder. The dealer informed the contact that the engine oil would be tested. The dealer also informed the contact that a claim was filed with the manufacturer for the repair to be covered under warranty, and the dealer was awaiting a response from the manufacturer. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was 27,820.

- Chester, SC, USA

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated while driving at an undisclosed speed, the contact observed an excessive amount of condensation on the interior of the vehicle. The check engine warning light was illuminated. The vehicle was towed to the dealer, who diagnosed a failure with the lifters resulting in misfires in the engine. The dealer also determined that cracks in the rear windshield glass guides resulted in excessive condensation in the vehicle. The vehicle was not repaired. After investigating the failure, the contact related the failure to Technical Service Bulletin: 18-NA-383. The manufacturer was notified of the failure, a case was opened. The contact was referred to the NHTSA Hotline for assistance. The failure mileage was 9,000.

- Ukiah, CA, USA

The contact owned a 2021 Chevrolet Silverado 1500. The contact stated that approximately 35 minutes after parking and turning the vehicle off he was notified that the vehicle had caught on fire. The fire department was called to the scene and extinguished the flames. Upon inspection, it was determined that the fire originated in the engine compartment. A police and fire report was taken at the scene and the vehicle was towed away. During the incident, the vehicle was destroyed. The manufacturer and local dealer were notified of the incident. The failure mileage was 12,000.

- Iowa City, IA, USA