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Discussion Starter #1
2002 DTS temp set to 80 degrees. Passenger side works fine with hot air all vents but the drivers side only blows cold air from any left vent, rear vent, and defrost. Any test I can perform.
 

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Super Moderator
White Diamond '03 DHS (with DTS floor shift)
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86,579 Posts
Yes, pull the DTC's. Look at the B (Body) codes and see if there is one for an actuator.
 

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Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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67,924 Posts
Use the correct section (JimD) of this link and use the OBD-II link to define any found codes before you post them.


Diagnostic codes read out as a letter, 4 digits, a letter.

P = Powertrain
B = Body
C =Chassis
U = electrical power and data

C = Current - the fault exists now
H = History - the fault has not been detected recently

So, B 0429 C = rear seat console air blend door is faulty
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,059 Posts
sounds like a failed #1 - LEFT/DRIVER - MIX DOOR actuator -
there should be a DTC pointing to this -

the part you'll need is ACDelco 15-72974 - you can buy it on-line for around $50 -
replacement can be done from up-under the dash - takes less than 90 minutes IF you're agile -
 

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Discussion Starter #5
Finally quit raining here and I installed a new Blend Door Actuator. Problem solved, and thanks to all.
 
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