July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Pcm Code P063 - Vehicle Speed & Set Speed Difference Too High: Action

PCM disengages cruise control.

Fig 1: PCM Code P063 Schematic - Vehicle Speed & Set Speed Difference Too High

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code P063 Flow Chart - Vehicle Speed & Set Speed Difference Too High

Courtesy of GENERAL MOTORS CORP.