Test Number 3)

This step checks the shift light circuit to ECM connector. If shift light comes on, ECM connector is faulty, or ECM does not have ability to ground circuit.

Fig 1: Chart C-8B Flow Chart, Shift Light (M/T)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Chart C-8B Schematic, Shift Light (M/T)

Courtesy of GENERAL MOTORS CORP.