Question about 2006 Pontiac Montana SV6
First off make sure the thermostat settings are set the same on the control panel for both front and rear units if thats ok it could b a few possibilities. 1 pluged heater core in rear 2 blocked heater hose try looking into these and see if it helps any
Posted on Dec 10, 2010
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Posted on Jan 02, 2017
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