Chevrolet Silverado 1500 2023 — service campaign
Bulletin N252508340 · NHTSA communication 11023151 · issued Sep 16, 2025
Service campaign
communication type
Engine
component
2023
model years
2
vehicle entries
Official summary
Certain vehicles may have a condition that could cause the engine coolant control valve to fail. If this condition were to occur, the Malfunction Indicator Lamp (Check Engine Light) will illuminate and a diagnostic trouble code will set. Additionally in some cases, the engine cooling fans may run after the engine is switched off. Dealers are to replace the coolant control valve as necessary. The repairs will be made at no charge to the customer.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.