Hello Everyone,   I have posted about canbus issues in the past. The issue has been isolated to damaged wires behind the heater core. I have been quoted just shy of 5k to replace the entire harness.  Is there any way these wires could have been damaged during an engine block replacement? My thought is when the heater core lines and ac lines were disconnected, the tech was a little rough and the wires got pinched or knicked.   Cheers,