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Thread: #17-NA-408: Information on Charge Air Cooler (CAC) Draining and Filling P0300

  1. #1
    Join Date
    Dec 2011
    New Haven, Ct

    Default #17-NA-408: Information on Charge Air Cooler (CAC) Draining and Filling P0300

    The 6.2L V8 engine (RPO LT4), available in 2017-2021 Camaro ZL1 and Corvette models, features an Eaton Roots-type superchargerthat creates a maximum boost pressure of 67 kPa (9.7 psi). The air entering the supercharger is cooled by an integral intercoolerto enhance the effectiveness of the supercharger. The intercooler uses conventional coolant in a system that is separate fromthe engine cooling system. It includes two charge air coolers/heatexchangers, a water manifold assembly, and a variety of sensors to monitor air temperature and pressure.

    If the supercharger cooling system is not properly evacuated and filled after service, DTC P0300 (Engine Misfire Detected)may set at high ambient temperatures during track speeds above 160 km/h (100 mph).

    Reference document id: 5001863 for LT4 or 4951587 for LT5
    GM World Class Certified Service Technician.
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  2. #2
    Join Date
    Jul 2008
    Northern NJ


    Yes we expected this as the cause of overheating.

    Thank you.

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