2002 Escalade computer codes

Is there a trick to check the ECM codes using the electronic climate controls in a 2002 Escalade? On older Cadillacs, the driver's display would show any codes after pressing "warm" and "off" simultaneously. Thanks.

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I don't think it can be done on the '96 and later vehicles with OBD II, you need a scan tool..
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Robert Hancock Saskatoon, SK, Canada
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If you are driving an Escalade, you have OnStar, push the button and they can tell you the code. Any time, any where.

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