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Old 10-16-2018, 04:02 PM   #1
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Join Date: Mar 2001
Location: Houston, tx
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Heater Valve, Controller and Solenoid

Now I'm having trouble with the heater on our 99 Suburban. I checked the vacuum lines going to the solenoid valve on the dash. I checked the vacuum heater hose valve and it is working. I pulled the connector at solenoid and Iím not getting any power there. Are there any fuses inline? Could it be the controller at the dash? Any help would be appreciated.
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Old 10-17-2018, 01:34 PM   #2
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Join Date: Jul 2002
Location: Gulfport, MS USA
Posts: 38,361
Re: Heater Valve, Controller and Solenoid

Only thing I remember about my 96 when it died is I had to replace the control module or whatever it is called. The thing with the knobs.

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