1994 PCM BLUE Connector

PCM Pin Out Chart 1994 4.3L, 5.0L, 5.7L With Automatic Transmission 4L60-E or 4L80-E

One row of the BLUE PCM's connector is prefixed with the letter E and its 16 terminals are labeled E-1 thru' E-16. The other row is prefixed with the letter F and its 16 terminals are labeled F-1 thru' F-16 (see the illustration above).

BLUE PCM 32 Pin Connector
Pin Wire Color Description
 E-1 GRY EGR Solenoid
 E-2 WHT 3-2 Shift Control Solenoid
 E-3 --- Not Used
 E-4 DK BLU Range Signal B
 E-5 RED Range Signal C
 E-6 BRN/WHT Check Engine Light (CEL)
 E-7 --- Not Used
 E-8 YEL/BLK 2-3 Shift Solenoid Enable
 E-9 LT GRN 1-2 Shift Solenoid Enable
E-10 TAN/BLK TCC Solenoid (4L60-E Only)
E-11 DK BLU TCC Solenoid (4L80-E Only)
E-12 DK GRN A/C Request
E-13 PPL Brake Switch
E-14 GRY 5 Volts (Reference Voltage for Sensors)
E-15 PNK/BLK IGN Fused
E-16 ORG Battery Feed
 F-1 PNK Range Signal A
 F-2 GRY/RED Trans Input Speed (+)
 F-3 DK BLU/WHT Trans Input Speed (-)
 F-4 --- Not Used
 F-5 --- Not Used
 F-6 DK GRN/WHT Fuel Pump Relay Control
 F-7 LT BLU/WHT Pressure Control Solenoid “Low”
 F-8 --- Not Used
 F-9 ORG/BLK Serial Data
F-10 RED/BLK Pressure Control Solenoid “Hi”
F-11 WHT Ignition Control Module Signal
F-12 BRN Vehicle Speed Sensor (VSS) Buffer Signal
F-13 DK BLU Vehicle Speed Sensor (VSS) Buffer Signal
F-14 GRY 5 Volt Sensor Reference Voltage (TPS, MAP)
F-15 PNK/BLK IGN Feed
F-16 DK GRN/YEL Canister Purge Solenoid
PCM Pin Out Chart 1994 4.3L, 5.0L, 5.7L With Automatic Transmission 4L60-E or 4L80-E

Safety Precautions

Here are some very important safety precautions when testing the wires coming out of the PCM connectors.

  1. If one or any of the wires on your GM vehicle DO NOT match the color stated in the pin out charts, then you should not use the pin out charts in this article. Why? Because this is the clearest indication that these ARE NOT the connector pin out charts for your particular vehicle.
  2. Never probe the front of the connector.
    1. You should use a wire piercing probe and probe the wire a few inches away from the connector.
      1. To see what this tool looks like: Wire Piercing Probe.
    2. You should use a Back Probe.
  3. Read the Disclaimer.