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2003 cadillac deville air problem

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It could be the blower motor, or perhaps a connector to the blower motor. Try turning on the rear-seat blower motor before you turn on the key. If it comes on but the main A/C blower does not, then it probably is the blower motor or its wiring.

The first thing you should do in trying to figure this out is to run the OBD codes, write them down, and post them here.

-- Click Here for CaddyInfo page on "How To" Read Your OBD Codes
-- Click Here for my personal page to download my OBD code list as an Excel file, plus other Cadillac data
-- See my CaddyInfo car blogs: 2011 CTS-V, 1997 ETC
Yes, I was Jims_97_ETC before I changed cars.

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