Hello majik755
Have you any update to this problem?
Anyhow, I stumbled across a description of a problem that is similar to yours in that it doesn't set a code, but otherwise it is different:
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No Crank, PRNDL Inoperative
Owners of some 2005 Chevrolet Corvettes and 2004 - 05 Cadillac XLRs may experience a no-crank condition, with no codes in any module. The concern may be followed by an inoperative transmission range indicator (PRNDL). The Tech 2 will show the transmission range circuits are all reading high when any gear is selected.
Check for a loose or broken ground G402 at the right rear suspension cradle. See SI document 1495107.
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Not sure how helpful this can be, but it does highlight a means to have a fault without a fault code.
Have you any update to this problem?
Anyhow, I stumbled across a description of a problem that is similar to yours in that it doesn't set a code, but otherwise it is different:
*****************
No Crank, PRNDL Inoperative
Owners of some 2005 Chevrolet Corvettes and 2004 - 05 Cadillac XLRs may experience a no-crank condition, with no codes in any module. The concern may be followed by an inoperative transmission range indicator (PRNDL). The Tech 2 will show the transmission range circuits are all reading high when any gear is selected.
Check for a loose or broken ground G402 at the right rear suspension cradle. See SI document 1495107.
*****************
Not sure how helpful this can be, but it does highlight a means to have a fault without a fault code.