Q: how much to fix AC (HVAC) air deliver mode door or actuator on 2002 Cadillac DeVille

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One or more heater & AC (HVAC) air delivery and/or temperature mode door actuator have failed. how much should it cost to fix.
(1) Answer
I just did one on my 05 Deville.had 2 places tell me it was a big I figured I'd try it myself.took out glove compartment and to my surprise the actuator is right there in left side..replaced part.took about 30 min total and it worked..they told me I have to take out the whole dash and a local dealer agreed so to those garages who said it would be a 2 day job..SCREW U I DID IT IN 30 MIN..saved 900 dollars