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John Roberts
John ... 4/9/2010
2000 GMC Sierra 1500 SLT 8 Cyl 5.3L - Engine
I hear a purging sound when heater is turned on. Intermitent
2 Answers
  • Bobby
    Bobby 4/9/2010
    Not sure what you mean by a purging sound. Do you mean a gurgling or bubbling sound? And where are you hearing it come from? Passenger side dash possibly?
  • John Roberts
    John Roberts 4/10/2010
    sounds like a soinoid or valve opening and closing when the heater is turned on and will come on and off while heater is in use
    Sound comes from up front engine compartment passenger side.

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