Code 63, Cruise System Problem 3.8L

PCM monitors cruise control system servo position to ensure desired cruise position and actual cruise position are equal to each other. If servo position is low when maximum servo position is commanded, PCM will set Code 63. Code 63 does not turn on SERVICE ENGINE SOON light. If Code 61, 62 or 65 is set with Code 63, repair other code before using this flow chart.

Fig 1: Code 63, Schematic, Cruise System Problem (3.8L)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Code 63, Flow Chart, Cruise System Problem (3.8L)

Courtesy of GENERAL MOTORS CORP.