Population expansion for emission recall
Chevrolet technical service bulletin N222359341 for 2019 Chevrolet Silverado 5500, 2022 Chevrolet Silverado 4500 and 2022 Chevrolet Silverado 6500.
- Bulletin number
- N222359341
- Component
- Electrical system
- Summary
- Population expansion for emission recall. Certain vehicles with a 6.6L diesel engine. In cold ambient temperatures when Diesel Emissions Fluid (DEF) in the DEF tank is frozen, the DEF tank pump may be activated before DEF has been sufficiently thawed by the heater. If this condition occurs, the control system may detect no DEF flow through the pump, set a Diagnostic Trouble Code (DTC), disable DEF dosing for the remainder of the drive cycle and alert the driver of an impending reduction in maximum vehicle speed. Dealers are to reprogram the ECM.
Vehicles covered
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