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Q:

blower in head mode on 2005 Chevrolet Trailblazer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
blower still blows at feet when put in head/foot or head mode
(2) Answers
This may be a problem with the motor actuators, or the system that controls them. If you are not familiar with these systems, get a good repair manual and read up on them, or take it to a shop so they can diagnose this problem.
http://bit.ly/alldata_repair_manuals
http://repairpal.com/gray-auto-repair