2008 Z71 Suburban with 206k miles. Engine has a misfires that does not set any code. Very that that the engine dies, occasionally when stopped at idle and in gear. If driving vehicle does not stop. When the mis-fire occurs the "DIC" displays park assist off, the door locks cycle and cruise control is turned off. Plugs, wires, O2 sensors and coils have been replaced when codes indicated. Can anyone help diagnose the problem? Thank you.