2021 Chevrolet Blazer

My 2021 Chevrolet Blazer has experienced repeated problems involving the cooling system and is now exhibiting recurring symptoms that concern me about the vehicle’s reliability and safety. In 2023, the vehicle required a radiator/cooling-system repair. In 2024, it again required radiator/cooling-system repair, which was performed under warranty. The vehicle is now experiencing an abnormal humming/clicking noise from under the hood. The problem initially occurred primarily after rain but has become increasingly frequent. When the noise occurs, the air-conditioning system stops cooling properly and blows warm air. The check-engine light has also illuminated intermittently. The exact component currently malfunctioning is unknown. The vehicle remains available for inspection. Because the symptoms involve the engine compartment and follow multiple previous cooling-system repairs, I am concerned about the possibility of overheating, loss of proper cooling-system operation, an unexpected breakdown while driving, or another mechanical failure that could place the occupants or other motorists at risk. Authorized Chevrolet dealerships previously inspected and repaired the vehicle’s cooling system in 2023 and again in 2024. Despite those repairs, significant symptoms have returned. The current problem has not yet been definitively diagnosed, so I cannot state that the present failure is the same component previously repaired. The warning symptoms include the abnormal under-hood humming/clicking, loss of cold air from the air-conditioning system when the condition occurs, and an intermittent check-engine light. The symptoms have become more frequent over time. I am reporting this because of the recurring nature of the problem and the vehicle’s history of multiple cooling-system repairs. I request that NHTSA document and evaluate this complaint together with any similar complaints involving this model and model year.

Vehicle is available upon request. 5/28/23 tires needed replaced, not even 30,000 miles on car. Customer was charged. 6/13/23 struts and mounts replaced at dealership 3/29/24-Revs high when barely touching pedal. Turned car off and it started back up on its own. Happens at least once a week. Dealership was unable to recreate. 4/1/24- wheel bearing replaced, customer was charged. April 2024 black metal showing through white paint. Paint was thin and fading. Dealership repainted the 2 doors that had paint issues. 12/20/24- Antifreeze level was at bottom of reservoir. Sloshing noise when driving. Was told air in hoses and will work it's way out. Was back at dealership 1/15/25, 1/24/25 & 2/5/25. Radiator fluid still dropping but even with dye test they can't figure out where it's going. Terrified it's going to effect the water pump and engine.