Apologies for delay...
EVO-ALL with a TB-GM2: STAND ALONE EVO-ALL & GM, Buick Enclave, Lucerne & (...) - Revision 20140123
There is one thing i would recommend you to try. Can you use your factory remote to unlock your doors while the vehicle is started? If the remote seizes to work while the engine is running, doing a standalone installation will be a little inconvenient considering you wouldnt be able to get in your vehicle while it's remote started. I'd recommend using a aftermarket piece at that point.