With 4L80-E Automatic Transmission

PCM Wiring Diagram (Part 1 of 5):

C11 = SERIAL DATA.
D6 = DIAGNOSTIC TEST.
C2 = SYSTEM GROUND.
C3 = SYSTEM GROUND.
C13 = OXYGEN SENSOR GROUND.
C14 = OXYGEN SENSOR SIGNAL.
D4 = 5 VOLT REFERENCE.
C10 = MAP SIGNAL.
D2 = MAP GROUND.
C4 = 5 VOLT REFERENCE.
C5 = TPS SIGNAL.
D3 = SENSOR GROUND.
D16 = ECT SIGNAL.
C6 = IAC "A" HIGH.
C7 = IAC "A" LOW.
C8 = IAC "B" LOW.
C9 = IAC "B" HIGH.
B12 = A/C REQUEST SIGNAL.

PCM Wiring Diagram (Part 2 of 5):

D1 = BATTERY FEED.
A1 = FUEL PUMP RELAY CONTROL.
D7 = FUEL PUMP SIGNAL.
C1 = IGNITION FEED.
A12 = BRAKE SIGNAL.

PCM Wiring Diagram (Part 3 of 5):

B6 = OUTPUT SPEED LOW.
B5 = OUTPUT SPEED HIGH.
B9 = INPUT SPEED HIGH.
B10 = INPUT SPEED LOW.
B11 = TRANSMISSION OUTPUT SPEED AND VEHICLE SPEED SIGNAL.
A11 = EGR SOLENOID.
A6 = AIR BYPASS VALVE.

PCM Wiring Diagram (Part 4 of 5):

D5 = KNOCK SIGNAL SENSOR.
A7 = MALFUNCTION INDICATOR LAMP CONTROL.
C16 = INJECTOR "A" CONTROL.
C15 = INJECTOR "B" CONTROL.
D11 = IC CONTROL.
D14 = IC REFERENCE.
D12 = IC BYPASS.
D13 = IC REFERENCE LOW.

PCM Wiring Diagram (Part 5 of 5):

D2 = TRANSMISSION FLUID TEMPERATURE GROUND.
D15 = TRANSMISSION FLUID TEMPERATURE SIGNAL.
A4 = TCC CONTROL.
A3 = SHIFT "A" SOLENOID CONTROL.
A2 = SHIFT "B" SOLENOID CONTROL.
B7 = PRESSURE CONTROL SOLENOID SIGNAL LOW.
B8 = PRESSURE CONTROL SOLENOID SIGNAL HIGH.
B4 = MANUAL VALVE SIGNAL "A".