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    1999 Cadillac DeVille

    I have a 1999 Cadillac DeVille and I changed the radiator and the thermostat but it still overheat going up hill and the fans are working well, I got no codes
    Vehicle: 1999 Cadillac DeVille
    asked Feb 20 by anonymous

    1 Answer

    The next step is to perform a compression test, to check the cylinder head gasket.
    answered Feb 20 by OBDIITech (32,220 points)

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