N192273400
GMC technical service bulletin N192273400 for 2020 GMC Sierra 2500 and 2020 Chevrolet Silverado 4500.
- Bulletin number
- N192273400
- Component
- Engine
- Summary
- N192273400 - Service Update. Certain LD vehicles may have a condition in which the right-hand side, positive crankcase ventilation (PCV) tube may not be fully seated (loose), allowing unrestricted blow-by gases to release to the atmosphere. Customers may experience a whistling sound, or there may be an audible air leak. Disconnection of this line is monitored through the fuel trim diagnostics, and in a worst-case scenario, the customer may experience a check engine light with DTC codes P0171 and/or P0174. Dealers are to inspect and ensure the PCV tube to the right-hand rocker is fully seated and secure.
Owners of these vehicles have filed 13 complaints in the engine category.
Vehicles covered
- GMC Sierra 2500 2020 2020
- Chevrolet Silverado 4500 2020 2020
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