INFLUENCE option of model can do Regress Diagnoise. Especially check DFBETAS diagnostic .
proc glmselect can do CV, but I don't know if it could do some logistic regression.
HoHo. That is really a big problem.
proc glmselect/hpgenselect can do "10-fold cross validation with resampling" .
I think your best choice is leveraging the power of SAS/IML and mixed PROC like:
proc iml;
x=sample().
.........
submit;
proc logistic.....
......
endsubmit;
......
quit;
Post it at IML forum, maybe Rick can give you something.
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