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Why does a/c blow out of defroster instead of vent?
2000 Chevrolet Silverado 2500

Why does a/c blow out of defroster instead of vent?

(2000 Chevrolet Silverado 2500)
mode does not shift to change location
What seems to make the problem better or worse? nothing
How long have you had this problem? today
Tags: chevrolet, silverado 2500
1 answer & 1 comment
Popular Answer
on October 15, 2019

Vacuum leak!
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on October 15, 2019

HVAC air flow mode selection is vacuum controlled..

Problem is typically found under hood within the vacuum supply circuit.

Vacuum line / tubing routing diagram under hood will be helpful.

May need *hands-on* assistance from qualified personnel.

Good luck!
General Diagnosis
$88 - $111 Learn More
on October 15, 2019

Vacuum leak!
Sign in to reply
on October 15, 2019

HVAC air flow mode selection is vacuum controlled..

Problem is typically found under hood within the vacuum supply circuit.

Vacuum line / tubing routing diagram under hood will be helpful.

May need *hands-on* assistance from qualified personnel.

Good luck!

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