Reductant Heater 1 Control Circuit Shorted to Control Circuit
P10D9 may mean the DEF reductant heater control circuit is seeing a possible circuit-to-circuit fault.
Article vehicle: 2020-2025 Chevrolet Silverado 2500 6.6 diesel
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P10D9: Reductant Heater 1 Control Circuit Shorted to Control Circuit
Vehicle-specific published guides for this diagnostic trouble code.