Chevrolet Silverado 1500 overheating problems

Filed Nov 2, 2026 · Electrical · TX

My 2019 Chevrolet Silverado 1500, VIN [XXX], with 137,640 miles, experienced repeated Battery Saver warnings, severe charging voltage fluctuations dropping as low as 9 volts, and intermittent reductions in engine power and RPM while driving. Upon inspecting the alternator, I discovered severe overheating at the positive battery cable (B+) connection. The plastic insulation surrounding the alternator terminal had melted away, and the charging cable insulation was brittle and heat-damaged. I have photographs documenting the damage. I reviewed GM safety recall N192273510 (the federal safety agency 19V888), which describes loose alternator B+ connections causing intermittent electrical failures, arcing, overheating, possible engine stalling, and fire hazards. The symptoms and physical damage described in this recall closely match what occurred on my vehicle. However, both Chevrolet and the federal safety agency indicate that my VIN is not included in the recall. I contacted GM Customer Assistance and received case number [XXX] after requesting escalation. GM advised that my case would not become active until a dealership inspected the vehicle. A Chevrolet dealership quoted $1,345 to replace the alternator and positive charging cable without physically inspecting the truck. Towing and diagnostic expenses are estimated at an additional $400. I am concerned that other 2019 Silverado vehicles excluded from recall 19V888 may experience the same potentially dangerous electrical failure. I request that the federal safety agency investigate whether the existing recall population should be expanded to include additional affected vehicles. The vehicle has not been repaired, and the damaged components remain available for inspection. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 26, 2026 · Engine · CA

Incident: Twice our Chevrolet Silverado 2020 Duramax has experienced while operating, sudden with no warning "reduced engine power" and "check engine light" the engine sounds very different and does not operate as it should and presents a safety issue when you are driving and traveling at a high rate of speed. These incidences occurred on 10-4-2026 and 10-23-2026. The vehicle experienced a sudden failure of the engine coolant control valve, triggering Diagnostic Trouble Code P1006. This component failure restricts proper engine thermal management and poses a risk of sudden engine overheating while driving. General Motors has formally acknowledged this identical part failure as a chronic manufacturing and safety defect via Special Coverage Bulletins N252508341 and N252508340, which extend warranty coverage to 15 years/150,000 miles. However, GM has arbitrarily excluded the 2020 model year from this coverage, despite the vehicle utilizing the exact same defective part assembly number as the covered 2021-2023 models. This identical component failure across model years constitutes an unaddressed defect pool that requires immediate regulatory expansion to protect consumers from unsafe engine component failure. please fix this situation TY

Filed Oct 24, 2026 · Electrical · WA

Due to a manufacturing defect outlined in Gm internal bulletin #PIT6452E caused an electrical motor to stall, overheat, melting the plastic HVAC box and actuator doors and fill the cabin with a burning plastic smell. 50°+ heat above cabin thermostat setting was documented blowing extreme heat and burning plastic smell into the cabin. The electrical short, burning smell and melted components make the vehicle unsafe to drive. The heat issue has been reproduced by the technician. Documentation of this issue is currently not available in writing. Verbally I am told all this but Both Kendall Chevrolet of Marysville and GM customer care supervisors refuse to put in writing any mention of melting, burning, electrical short, safety hazards or that the vehicle is not safe to drive, even after multiple requests for written documentation. The only inspection I am aware of is from Kendall Chevrolet service department. No dashboard lights or warnings illuminated.

Filed Oct 2, 2026 · Driver assistance, Electrical · FL

Components: rear vision camera display, front camera module/lane keep assist, and the center infotainment/navigation screen. The vehicle is currently with the dealership. Failures: The rear camera image intermittently distorts into a severe fisheye view, so I cannot judge distance or what is behind the truck when backing. Lane keep assist intermittently will not activate. The center screen freezes, becomes unresponsive, makes phantom inputs, overheats, goes black, and reboots on its own, cutting off navigation while driving. Safety risk: A distorted backup camera creates a risk of striking pedestrians, children, or objects when reversing a full-size pickup. Losing lane keep assist removes a driver-assistance safety function. The screen shutting off during active navigation has caused me to lose directions while driving in unfamiliar areas, which is distracting and has led me to get lost. Dealer confirmation: Reported to [XXX] at Milton Chevrolet ([XXX]) the day after delivery at 30 miles. Repair Order #XXX(XXX) confirmed the lane assist failure and found DTCs U3000 and U0131 stored in the Front Camera Module. The dealer cleared the codes and moved a toll transponder; no part was replaced. The touchscreen issue was not duplicated during a 10-minute test. The camera and screen failures continued, and I recorded multiple videos of them. Manufacturer: GM reviewed my repurchase request under Case #XXX and denied it on XXX. The vehicle has not been inspected by GM, and the defects remain unrepaired. Warning signs: Symptoms began immediately after delivery on XXX. No specific warning lamp was observed; the lane assist button light failed to illuminate when pressed. Current mileage is approximately 1,200. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 20, 2026 · Engine · NJ

The water pump went bad at 31,000 miles. If I continued driving and the pulley fell off the engine would overheat. I took it to the dealer and they confirmed the pump failure and want me to pay over $1,400 for repair that should be covered under warranty. There was no warning lamps lit, the pump just started making a grinding sound.

Filed Aug 30, 2026 · Engine, Fuel system · IN

AFM causing engine tick. I am reporting a radiator failure on my 2019 Chevrolet Silverado 1500 equipped with the 6.2L V8. The vehicle developed an active coolant leak from the radiator assembly. The coolant reservoir level dropped significantly after normal driving, and coolant was visibly leaking and collecting underneath the vehicle. The truck initially began running warmer than normal, approximately 215–220°F, before the leak was fully identified. After topping the system with the correct DEX-COOL coolant, the coolant level continued to drop and an external leak became clearly visible. The vehicle was subsequently parked to avoid engine overheating or further damage. The original radiator carries GM part number 84152439. I have since been advised that the current GM replacement radiator is part number 85575815. I was also informed by GM dealership personnel that radiator failures involving this application are currently being investigated. My concern is that a sudden radiator failure can result in rapid coolant loss and overheating, potentially causing engine damage or vehicle disablement while driving. This is particularly concerning because the temperature gauge may initially remain near normal even while coolant is being lost. I am requesting that the federal safety agency review radiator failures on 2019 Chevrolet Silverado 1500 models, particularly vehicles equipped with the 6.2L engine and heavy-duty/enhanced cooling package, to determine whether there is a pattern of premature radiator cracking, tank/seam failure, or other coolant-loss defects that warrant a safety investigation, service campaign, or recall.

Filed Aug 30, 2026 · SC

Radio screen display, overheating, bubbling at the bottom of the screen trim underneath air conditioner show signs of overheating have been replaced before GMC and Chevrolet is aware of this matter. Initially made no notes to Tri to inform me of this hazard of the overheating of the screen and blacking out of the screen commonly referred to a ghost screen. The trim was replaced under the warranty at 10,000 miles, but Hendrick Chevrolet dealership located in [XXX] phone number [XXX] service Provider was [XXX] not able to drive because I am fear of screen, overheating, and catching on fire INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 13, 2026 · Engine · 21,000 miles · AL

The contact owns a 2024 Chevrolet Silverado 1500. The contact stated that while driving 45 MPH uphill with a boat hitched on a trailer, while depressing the accelerator pedal, the engine overheated and the vehicle was pulled over and the idol warning message was displayed. The contact pulled over to the right side of the road, however the vehicle lost power with the boat trailer wheel still on the highway. A dealer was contacted. The vehicle was towed to the dealer and was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and opened a case. The failure mileage was 21,000.

Filed Jul 17, 2026 · Engine · 105,000 miles · MI

The contact owns a 2021 Chevrolet Silverado 1500. The contact stated that the engine occasionally overheated. The check engine warning light was illuminated for a day, and there were six diagnostic trouble codes displayed. The vehicle was taken to the dealer to be diagnosed, and it was determined that the coolant flow control valve was inoperable and needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure and confirmed that the repair was not covered under warranty or recall. The contact became aware of GMC Special Programs: N252508340 and N25250834, which were associated with the failure; however, the VIN was not included. The manufacturer referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was approximately 105,000.

Filed Jul 14, 2026 · Electrical, Engine · TN

Loss of engine power while merging or passing traffic. * Reduced acceleration making it difficult to enter highways safely. * Engine overheating if the active grille shutters fail in the closed position. * Unexpected limp mode causing sudden speed reduction in traffic. * Increased risk of a rear-end collision due to loss of power or reduced speed. * Check engine light and warning messages distracting the driver. * Vehicle stalling while driving or at intersections. * Reduced visibility if the defroster or HVAC performance is affected by engine temperature issues. * Potential engine damage from overheating, creating a hazard if the vehicle becomes disabled on the roadway. The active grille shutter system malfunctioned and caused warning lights to illuminate. I am concerned that the shutters remaining closed could lead to engine overheating or reduced vehicle performance while driving, increasing the risk of an accident due to loss of power or unexpected vehicle behavior in traffic.