On our 2007 GXP, the transmission will not shift out of Park. The shift lever will move through all gear selectors, but trans is not engaging in any of the gears. The brake swicth is good and the interlock switch is good.
This model has the (mode) Manual Shift Auxiliary Position Switches on the steering wheel. Could these be bad? Maybe the linkage came off the shift lever?
I do not yet know if there are codes stored in the computer. I will check for codes this weekend.
I`m wondering if anyone has had this problem and what you did to fix it?