Caddyjag Posted August 28, 2004 Report Share Posted August 28, 2004 Does anyone know hot to extract the diagnostic codes from a 1998 Deville???? Caddyjag Link to comment Share on other sites More sharing options...
up2ng Posted August 28, 2004 Report Share Posted August 28, 2004 off and warmer at the same time on the climate control. go to http://myweb.accessus.net/~090/dtcobd2.html to see what the codes mean Link to comment Share on other sites More sharing options...
Caddyjag Posted August 29, 2004 Author Report Share Posted August 29, 2004 I've tried it and codes won't show up. I have to to this procedure for my 94 SLS, and it does work on that one. But not on my dad's newly adquired 98 Deville. Caddyjag Link to comment Share on other sites More sharing options...
Ranger Posted August 29, 2004 Report Share Posted August 29, 2004 Unless they changed things from '97 to '98, simultaneously press and hold the off and warmer buttons til the DIC lights all segments as a segment check. Then release and the codes should appear at the bottom. Link to comment Share on other sites More sharing options...
bigfoo Posted August 29, 2004 Report Share Posted August 29, 2004 If it's like my sts, hold the on/off button and hold the info up at the same time Link to comment Share on other sites More sharing options...
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