teslatech Posted December 10, 2008 Report Share Posted December 10, 2008 When starting up there is a chattering noise from somewhere behind dash and air flow is usually directed to floor even though upper vents are selected. On rare occasion the air is directed to upper vents, but after shut off it will go back to lower. Where are the blend door locations for 02 Deville and what might be causing the problem? Link to comment Share on other sites More sharing options...
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