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HOMESERVICE MANUALSCHEVROLET2005CHEVY EXPRESS G3500, VAN PASSENGER, LQ4REPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSWIRING DIAGRAMSOEM CONNECTOR END VIEWSPOWERTRAIN CONTROL MODULE (PCM) CONNECTOR END VIEWS (6.0L CNG JL4)POWERTRAIN CONTROL MODULE (PCM) CONNECTOR END VIEWS
2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4

Powertrain Control Module (PCM) Connector End Views

2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4SECTION Powertrain Control Module (PCM) Connector End Views
Powertrain Control Module (PCM) - C1

GM684875Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 80-Way F Micro-Pack 100W Series Sealed Assembly
  • 12191489 Does not include the following:
    • TPA (BU) 12176408
    • Terminal - 12084912
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
8 GY 474 5-Volt Reference
9-10 - - Not Used
11 L-BU 1876 Knock Sensor 2 Signal
12 YE 573 CKP Sensor 1 Signal
13 OR/BK 463 Requested Torque Signal
14 OR/BK 1061 UART Serial Data
15 D-BU/WH 774 UART Serial Data
16 - - Not Used
17 D-BU 1225 Transmission Fluid Pressure Switch Signal B
18 OR 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 PU 5607 Fuel Gauge Select Signal
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 - - Not Used
42 D-BU 5617 Low Pressure Lock-Off (LPL) Control
43 OR/BK 877 Fuel Injector 7 Control
44 L-BU/BK 844 Fuel Injector 4 Control
45 GY 5634 5-Volt Reference
46 GY 2709 5-Volt Reference
47 - - Not Used
48 GY 597 5-Volt Reference
49-50 - - Not Used
51 D-BU 496 Knock Sensor 1 Signal
52 - - Not Used
53 TN 2762 Low Reference
54 OR/BK 469 Low Reference
55 - - Not Used
56 PK/BK 5605 Fuel Injection Control Module Status
57 RD/WH 440 Battery Positive Voltage
58 D-GN 1049 Class 2 Serial Data
59 - - Not Used
60 TN 476 Low Reference
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 Off/Run/Crank Voltage
76 TN/WH 845 Fuel Injector 5 Control
77 D-BU/WH 878 Fuel Injector 8 Control
78-79 - - Not Used
80 TN 2761 Low Reference
Powertrain Control Module (PCM) - C2

GM684875Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 80-Way F Micro-Pack 100W Series Sealed Assembly
  • 12191488 Does not include the following:
    • TPA (GN) - 15358857
    • Terminal - 12084912
Pin Wire Color Circuit No. Function
1 BK/WH 1551 Ground
2 BN 418 TCC PWM Solenoid Valve Control
3 L-GN 5606 Fuel Gage Select Signal
4 - - Not Used
5 TN/BK 464 Delivered Torque Signal
6 OR/BK 1228 PC Solenoid Valve High Control (Sol. A)
7 - - Not Used
8 L-BU/WH 1229 PC Solenoid Valve Low Control (Sol. A)
9 D-GN/WH 465 Fuel Pump Relay Control - Primary
10-13 - - Not Used
14 D-GN/WH 5633 Alternative Fuel Tank Pressure Sensor Signal
15 OR 225 Generator Turn On Signal
16 - - Not Used
17 D-GN/WH 2523 A/C Request Signal
18-19 - - Not Used
20 PU 401 Signal Low - Front
21 YE 400 Signal High - Front
22 OR/BK 1230 AT ISS High Signal
23 D-BU/WH 1231 AT ISS Low Signal
24 D-BU 5622 Fuel Rail Pressure Sensor Signal
25 TN 472 IAT Sensor Signal
26 PU 2121 IC 1 Control
27 OR 2127 IC 7 Control
28 L- BU/WH 2126 IC 6 Control
29 D-GN/WH 2124 IC 4 Control
30 D-BU/WH 5695 Fuel Rail Temperature Sensor PWM Signal
31 YE 492 MAF Sensor Signal
32 L-GN 432 MAP Sensor Signal
33 L-BU 5618 High Pressure Lock-Off (HPL) Control
34 D-GN/WHT 428 EVAP Canister Purge Solenoid Control
35-38 - - Not Used
39 OR 631 12-Volt Reference
40 BK/WH 1551 Ground
41-42 - - Not Used
43 D-GN/WH 459 A/C Compressor Clutch Relay Control
44 - - Not Used
45 WH 1310 EVAP Canister Vent Solenoid Control
46 BN/WH 419 MIL Control
47 YE/BK 1223 2-3 Shift Solenoid or Shift Solenoid B Valve Control
48 L-GN 1222 1-2 Shift Solenoid or Shift Solenoid A Valve Control
49 YE/BK 1827 Vehicle Speed Signal
50 - - Not Used
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 - Primary
55 D-GN 603 A/C Low Pressure Switch Signal
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 OR 2531 Alternative Fuel Operation (AFO) Enable
66 PU/WH 2128 IC 8 Control
67 OR/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-BLU 5038 HO2S Heater Low Control - Bank 1 Sensor 1
73 D-BU 5632 Alternative Fuel Tank Temperature Signal
74 PU/WH 5037 HO2S Heater Low Control - Bank 2 Sensor 1
75 GY 23 Generator Field Duty Cycle Signal
76-80 - - Not Used
RENDER: 1.0x

NO RELATED

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  • • 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.
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