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Home >> Chevrolet >> 2005 >> Chevy Express G3500, Van Passenger Extended >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.8L, 5.3L, And 6.0L - Introduction >> Component Locator >> Powertrain Control Module (PCM) Connectors
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Powertrain Control Module (PCM) Connectors

Powertrain Control Module (PCM) - C1

GM655733Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12191489
  • 80-Way F Micro-Pack 100W Sealed (BU)
Pin Wire Color Circuit No. Function
1 BK/WH 1551 Ground
2 L-GN 1867 12-Volt Reference
3 PK/BK 1746 Fuel Injector 3 Control
4 L-GN/BK 1745 Fuel Injector 2 Control
5-6 - - Not Used
7 GY 2705 5-Volt Reference A
8 GY 2701 5-Volt Reference A (w/o JL4)
9-10 - - Not Used
11 L-BU 1876 Knock Sensor 2 Signal
12 YE 573 CKP Sensor Signal
13 OG/BK 463 Requested Torque Signal (JL4)
14 OG/BK 1061 UART Serial Data (JL4)
15 D-BU/WH 774 UART Serial Data (JL4)
16 - - Not Used
17 D-BU 1225 Transmission Fluid Pressure Switch Signal B
18 OG 1226 Transmission Fluid Pressure Switch Signal C
19 PK 439 Ignition 1 Voltage
20 RD/WH 440 Battery Positive Voltage
21 PU 574 Low Reference
22 - - Not Used
23 TN 2759 Low Reference
24 BK/WH 1551 Ground
25 TN 1671 HO2S Low Signal - Bank 2 Sensor 2
26 TN 1667 HO2S Low Signal - Bank 2 Sensor 1
27 BK/WH 1551 Ground
28 TN/WH 1669 HO2S Low Signal - Bank 1 Sensor 2
29 TN 1664 HO2S Low Signal - Bank 1 Sensor 1
30-31 - - Not Used
32 TN/WH 771 Transmission Range Switch Signal A
33 PU 420 TCC Brake Switch/Cruise Control Release Signal
34 WH 776 Transmission Range Switch Signal P
35 - - Not Used
36 TN 1744 Fuel Injector 1 Control
37 YE/BK 846 Fuel Injector 6 Control
38 - - Not Used
39 YE/BK 625 Starter Enable Relay Control
40 BK/WH 1551 Ground
41-42 - - Not Used
43 OG/BK 877 Fuel Injector 7 Control
44 L-BU/BK 844 Fuel Injector 4 Control
45 - - Not Used
46 GY 2709 5-Volt Reference B
47 - - Not Used
48 GY 597 5-Volt Reference A
49-50 - - Not Used
51 D-BU 496 Knock Sensor 1 Signal
52 - - Not Used
53 TN 2762 Low Reference
54 OG/BK 469 Low Reference
55-56 - - Not Used
57 RD/WH 440 Battery Positive Voltage
58 D-GN 1049 Class 2 Serial Data
59 - - Not Used
60 TN 2752 Low Reference (w/o JL4)
61 PK/BK 632 Low Reference
62 - - Not Used
63 BK 2755 Low Reference
64 BK/WH 1551 Ground
65 PU 1670 HO2S High Signal - Bank 2 Sensor 2
66 PU 1666 HO2S High Signal - Bank 2 Sensor 1
67 BK/WH 1551 Ground
68 PU/WH 1668 HO2S High Signal - Bank 1 Sensor 2
69 PU/WH 1665 HO2S High Signal - Bank 1 Sensor 1
70 BN 1174 Oil Level Switch Signal
71 - - Not Used
72 YE 772 Transmission Range Switch Signal B
73 BN/WH 633 CMP Sensor Signal
74 YE 410 ECT Sensor Signal
75 PK 1020 Ignition 0 Voltage
76 TN/WH 845 Fuel Injector 5 Control
77 D-BU/WH 878 Fuel Injector 8 Control
78 - - Not Used
79 WH 687 3-2 Shift Solenoid Valve Control (5.3L)
80 TN 2761 Low Reference
Powertrain Control Module (PCM) - C2

GM684875Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 12191488
  • 80-Way F Micro-Pack 100W Sealed (GN)
Pin Wire Color Circuit No. Function
1 BK/WH 1551 Ground
2 BN 418 TCC PWM Solenoid Valve Control
3-4 - - Not Used
5 TN/BK 464 Delivered Torque Signal (JL4)
6 OG/BK 1228 PC Solenoid Valve High Control
7 - - Not Used
8 L-BU/WH 1229 PC Solenoid Valve Low Control
9 D-GN/WH 465 Fuel Pump Relay Control - Primary
10-12 - - Not Used
13 L-BU/BK 396 Cruise Control Engaged Signal (w/o JL4)
14 - - Not Used
15 OG 225 Generator Turn On Signal
16 - - Not Used
17 D-GN/WH 2523 A/C Request Signal (C60)
18-19 - - Not Used
20 PU 401 Signal Low - Front
21 YE 400 Signal High - Front
22 OG/BK 1230 AT ISS High Signal (4L80-E/4L85-E)
23 D-BU/WH 1231 AT ISS Low Signal (4L80-E/4L85-E)
24 D-BU 411 TP Sensor Signal (w/o JL4)
25 TN 472 IAT Sensor Signal
26 PU 2121 IC 1 Control
27 OG 2127 IC 7 Control
28 L-BU/WH 2126 IC 6 Control
29 D-GN/WH 2124 IC 4 Control
30 - - Not Used
31 YE 492 MAF Sensor Signal
32 L-GN 432 MAP Sensor Signal
33 - - Not Used
34 D-GN/WH 428 EVAP Canister Purge Solenoid Valve Control
35-36 - - Not Used
37 D-GN 83 Cruise Control Inhibit Signal (w/o JL4 or Early Production JL4)
38 - - Not Used
39 OG 631 12-Volt Reference
40 BK/WH 1551 Ground
41 - - Not Used
42 TN/BK 422 TCC Solenoid Valve Control (5.3L)
43 D-GN/WH 459 A/C Compressor Clutch Relay Control (C60)
44 - - Not Used
45 WH 1310 EVAP Canister Vent Solenoid Valve Control
46 BN/WH 419 MIL Control
47 YE/BK 1223 2-3 Shift Solenoid Valve Control
48 L-GN 1222 1-2 Shift Solenoid Valve Control
49 YE/BK 1827 Vehicle Speed Signal
50 D-GN/WH 817 Vehicle Speed Signal (w/o JL4)
51 YE/BK 1227 TFT Sensor Signal
52 PU 5035 HO2S Heater Low Control - Bank 1 Sensor 2
53 YE 5036 HO2S Heater Low Control - Bank 2 Sensor 2
54 PU 1589 Fuel Level Sensor Signal
55 D-GN 603 A/C Low Pressure Switch Signal (C60)
56 - - Not Used
57 TN 470 Low Reference
58 TN/WH 331 Oil Pressure Sensor Signal
59 PU 806 Crank Voltage
60 BN 2129 Low Reference
61 BN/WH 2130 Low Reference
62 GY 773 Transmission Range Switch Signal C
63 PK 1224 Transmission Fluid Pressure Switch Signal A
64 D-GN 890 Fuel Tank Pressure Sensor Signal
65 - - Not Used
66 PU/WH 2128 IC 8 Control
67 OG/WH 2122 IC 2 Control
68 D-GN 2125 IC 5 Control
69 L-BU 2123 IC 3 Control
70-71 - - Not Used
72 L-BU 5038 HO2S Heater Low Control - Bank 1 Sensor 1
73 - - Not Used
74 PU/WH 5037 HO2S Heater Low Control - Bank 2 Sensor 1
75 GY 23 Generator Field Duty Cycle Signal
76 L-GN/WH 1749 IAC Coil B High Control (w/o JL4)
77 L-GN/BK 444 IAC Coil B Low Control (w/o JL4)
78 L-BU/BK 1748 IAC Coil A Low Control (w/o JL4)
79 L-BU/WH 1747 IAC Coil A High Control (w/o JL4)
80 - - Not Used
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