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78SilveradoSWB · 08-24-2003, 05:36 PM

With the engine off and the power on, I would think you should hear the vacumn actuator open and close. The cable might be kinked or the vent door mechanism stuck?

08-24-2003, 05:36 PM	#3
78SilveradoSWB Senior Member Join Date: Apr 2002 Location: Beaverton, OR Posts: 1,615	With the engine off and the power on, I would think you should hear the vacumn actuator open and close. The cable might be kinked or the vent door mechanism stuck? __________________ Mitch 1978 Chevrolet Silverado C 10 454 BB, TH400