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lookinf for a little help

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Old Apr 27, 2011 | 11:52 PM
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on my 1999 jimmy with auto climate controls when hard accelerating or going up hills the heat/air will stop blowing out of vents and go to defrost or vice versa.anyone ran into this?
 
Old May 1, 2011 | 09:03 AM
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normal because it is vacuum actuated, so when you accelerate hard there is low vacuum at the climate controls causing that change
 
Old May 1, 2011 | 09:40 AM
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Double check that the vacuum line is connected to the canister in the driver's side fender.
 
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