I have encountered a problem with the climate control in my '92 DeVille. Air comes out of the defrost vents and floor vent but will not switch over to the dash vents until (I am not joking!!) after 6:30 pm. So in the morninng I can not see because of condensation and I burn up during the day. I had the same problem with my '83 Regal, which was easy to bypass due to its mainly mechanical and not electrical construction. How can I get the vents to work properly or at least bypass the system to blow out of the dash vents.
GMNUT