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Old January 22nd, 2013, 07:13 PM   #1
muddinman56
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Default silverado heater

every time i start the truck or shut it off the heater box makes a thumping sound for about 25-35 seconds
just wondering what is causing this and if i can fix it with out takeing the dash off

thanks
Matt
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Old January 22nd, 2013, 07:23 PM   #2
outback auto
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every time i start the truck or shut it off the heater box makes a thumping sound for about 25-35 seconds
just wondering what is causing this and if i can fix it with out takeing the dash off

thanks
Matt
it is the actuator behind the glove box it opens and shuts the vent .you can fix it or just unplug it
..
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Old January 22nd, 2013, 07:28 PM   #3
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thanks
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Old January 22nd, 2013, 07:36 PM   #4
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thanks
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Old January 25th, 2013, 10:32 PM   #5
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ok i can not find any thing but the computer and 4 fuses behind the glove box
this is where the noise is coming from and u can see it move when the thumping noise happens
that white plastic piece is what im talking about
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