2004 Chevrolet Impala LSFACTORY OEM SERVICE PROCEDURE

Powertrain Control Module (PCM) Connector End Views

Powertrain Control Module Terminal Identification, C1

GM73173Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12191110
  • 80-Way F Micro-Pack 100W Series Sealed (BLU)
Pin Wire Color Circuit No. Function
1 BLK 2762 Low Reference
2-3 - - Not Used
4 LT GRN 1222 1-2 Shift Solenoid Valve Control
5 DK BLU 473 High Speed Cooling Fan Relay Control
6 DK GRN 335 Low Speed Cooling Fan Relay Control
7 BLK 630 Camshaft Position Signal
8 PPL/WHT 430 Low Resolution Engine Speed Signal
9 LT BLU/BLK 647 Medium Resolution Engine Speed Signal
10 GRY 2704 5-Volt Reference
11 - - Not Used
12 BLK 808 Low Reference
13 ORN/BLK 469 Low Reference
14-15 - - Not Used
16 BLK/WHT 451 Ground
17 BLK 2760 Low Reference
18 - - Not Used
19 PPL 1500 Ignition 0 Voltage
20 ORN 1740 Battery Positive Voltage
21-27 - - Not Used
28 BLK 808 Low Reference
29 BLK 808 Low Reference
30 PPL 420 TCC Brake Switch Signal
31 BLK 2753 Low Reference
32 GRY/BLK 435 EGR Solenoid Low Control
33 DK BLU 496 KS 1 Signal
34 LT BLU 1876 KS 2 Signal
35-37 - - Not Used
38 LT GRN/WHT 1749 IAC Coil B High Control
39-42 - - Not Used
43 YEL/BLK 846 Fuel Injector 6 Control
44 YEL/BLK 1223 2-3 Shift Solenoid Valve Control
45 - - Not Used
46 LT BLU/BLK 844 Fuel Injector 4 Control
47 BLK/WHT 845 Fuel Injector 5 Control
48 RED/BLK 453 Low Reference
49-52 - - Not Used
53 TAN/BLK 424 IC Timing Signal
54 WHT 423 IC Timing Control
55 DK GRN 389 Vehicle Speed Signal
56 BLK/WHT 451 Ground
57 BLK/WHT 451 Ground
58 - - Not Used
59 DK GRN 1049 PCM Class 2 Serial Data
60 BLK/WHT 451 Ground
61 BLK 2752 Low Reference
62 DK BLU/WHT 1231 AT ISS Low Signal
63 RED/BLK 1230 AT ISS High Signal
64 YEL 400 VSS High Signal
65 PPL 401 VSS Low Signal
66-67 - - Not Used
68 YEL 772 Transmission Range Switch Signal B
69 YEL 492 MAF Sensor Signal
70 - - Not Used
71 ORN/BLK 463 Requested Torque Signal (JL9)
72 DK GRN 83 Cruise Control Inhibit Signal
73 LT GRN/BLK 1745 Fuel Injector 2 Control
74-75 - - Not Used
76 DK GRN/WHT 428 EVAP Canister Purge Solenoid Control
77-78 - - Not Used
79 BLK 1744 Fuel Injector 1 Control
80 BLK 2751 Low Reference
Powertrain Control Module Terminal Identification, C2

GM73173Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12191110
  • 80 Way F Micro-Pack 100W Series Sealed (CLR)
Pin Wire Color Circuit No. Function
1 - - Not Used
2 WHT 1310 EVAP Canister Vent Solenoid Control
3 DK GRN/WHT 465 Fuel Pump Relay Control
4 RED 1676 EGR Solenoid High Control
5 BRN/WHT 419 MIL Control
6 - - Not Used
7 LT BLU/WHT 1747 IAC Coil A High Control
8 - - Not Used
9 TAN/BLK 464 Delivered Torque Signal (JL9)
10 PPL 412 HO2S High Signal-Sensor 1
11 PPL/WHT 1668 HO2S High Signal-Sensor 2
12-15 - - Not Used
16 WHT 776 Transmission Range Switch Signal P
17 - - Not Used
18 BLK/WHT 771 Transmission Range Switch Signal A
19 TAN/BLK 231 Oil Pressure Switch Signal
20-22 - - Not Used
23 PPL 806 Crank Voltage
24 PNK 239 Ignition 1 Voltage
25 LT GRN 432 MAP Sensor Signal
26 YEL 410 ECT Sensor Signal
27 RED/BLK 380 A/C Refrigerant Pressure Sensor Signal
28 BRN 1456 EGR Valve Position Signal
29 - - Not Used
30 GRY 2702 5-Volt Reference
31 - - Not Used
32 GRY 2709 5-Volt Reference
33 GRY 2701 5-Volt Reference
34 GRY 2700 5-Volt Reference
35 BLK 808 Low Reference
36 - - Not Used
37 BLK/WHT 3113 HO2S Heater Low Control-Sensor 1
38 - - Not Used
39 DK GRN/WHT 459 A/C Compressor Clutch Relay Control
40-41 - - Not Used
42 PNK/BLK 1746 Fuel Injector 3 Control
43 - - Not Used
44 LT BLU/BLK 1748 IAC Coil A Low Control
45 RED/BLK 1228 PC Solenoid Valve High Control
46 LT BLU/WHT 1229 PC Solenoid Valve Low Control
47 - - Not Used
48 BRN 3122 HO2S Heater Low Control-Sensor 2
49 LT GRN/BLK 444 IAC Coil B Low Control
50 TAN 472 IAT Sensor Signal
51-54 - - Not Used
55 DK GRN 890 Fuel Tank Pressure Sensor Signal
56 GRY 773 Transmission Range Switch Signal C
57 - - Not Used
58 BRN 1174 Oil Level Switch Signal
59 WHT 85 Cruise Control Engaged Signal
60 - - Not Used
61 RED 225 Generator Turn On Signal
62 - - Not Used
63 YEL 657 TCC Release Switch Signal
64-65 - - Not Used
66 DK BLU 417 TP Sensor Signal
67 - - Not Used
68 YEL/BLK 1227 TFT Sensor Signal
69 PPL 1589 Fuel Level Sensor Signal
70-75 - - Not Used
76 YEL/BLK 625 Starter Enable Relay Control
77 GRY 1724 Boost Control Solenoid Control (L67)
78 BRN 418 TCC PWM Solenoid Valve Control
79-80 - - Not Used
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  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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