Storage Evaporative Emissions Canister Problems of Chevrolet Silverado 1500

The contact's daughter owns a 2023 Chevrolet Silverado 1500. While the contact's daughter was driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to an independent mechanic where it was diagnosed with a failed evaporative emission purge pump. The contact was advised to take the vehicle to the dealer. The dealer was contacted by phone and made aware of the failure. The vehicle was taken to the dealer where the failure was confirmed. The contact was informed that the repair was covered under an unknown recall. The contact was later informed that the repair was not covered under the unknown recall. The contact referenced an unknown recall; however, the VIN was not associated with a recall. The vehicle was taken back to an independent mechanic and the vehicle was repaired. The manufacturer was contacted by phone and made aware of the failure. The contact was advised to contact the NHTSA hotline to report the failure. The failure mileage was approximately 58,010.

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The contact owns a 2017 Chevrolet Silverado 1500. The contact stated while driving at an undisclosed speed, the contact removed his foot from the accelerator pedal to depress the brake pedal while approaching a stop light, the vehicle stalled. The contact cycled the key several times when the vehicle started. A message displayed on the instrument panel “evaporative emission system pressure system/switch range/performance”. The contact stated that he was concerned for safety while driving the vehicle. The contact stated that on a separate occasion while driving at an undisclosed speed, he heard a knocking sound coming from the hood of the vehicle. The contact then used a code reader to diagnose the vehicle and retrieved dtc code: p0451 – (evaporative emission system pressure) and p0304 (cylinder 4 misfire). The dealer was not notified of the failure. The vehicle was not repaired. The manufacturer was notified of the failure and the contact was informed that a claim would be started after the vehicle was taken to the dealer. The failure mileage was approximately 160,000.

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The contact owns a 2019 Chevrolet Silverado 1500. The contact stated that while driving at various speeds, the vehicle shuddered. Several unknown warning lights were illuminated. The local dealer was contacted, and the vehicle was diagnosed, and it was determined that the purge valve and evap system needed to be replaced. The vehicle was repaired, but the failure recurred. The vehicle was taken back to the dealer, where it was determined that the fuel pump control module needed to be replaced. The vehicle was not repaired due to parts not being available. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 80,000.

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