LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2001 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 4.8L, 5.3L, And 6.0L - Component Locator >> Component Locator >> Powertrain Control Module Connector End Views >> Powertrain Control Module (PCM) C1 (BLU)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Powertrain Control Module (PCM) C1 (BLU)

Powertrain Control Module (PCM) C1 (BLU)

GM23346
Connector Part Information
  • PCM Connector C1 Assembly 12191489
  • TPA (BLU) 12176408
  • Connector Cover 12191108
Pin Wire Color Circuit No. Function
1 BLK/WHT 451 Ground
2 LT GRN 1867 12 Volt Reference
3 PNK/BLK 1746 Fuel Injector 3 Control
4 LT GRN/BLK 1745 Fuel Injector 2 Control
5-10 - - Not Used
11 LT BLU 1876 Knock Sensor 2 Signal
12 DK BLU/WHT 1869 CKP Sensor Signal
13 ORN/BLK 463 Requested Torque Signal
14 ORN/BLK 1061 UART Serial Data [Secondary]
15 DRK BLU/WHT 774 UART Serial Data [Tertiary]
16 - - Not Used
17 DK BLU 1225 Transmission Fluid Pressure Switch Signal B
18 RED 1226 Transmission Fluid Pressure Switch Signal C
19 PNK 439 Ignition 1 Voltage
20 ORN 440 Battery Positive Voltage
21 YEL 1868 Low Reference
22 - - Not Used
23 PPL 719 Low Reference
24 - - Not Used
25 TAN 1671 HO2S Low Signal [- Bank 2 Sensor 1]
25 TAN 413 HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)
26 TAN 1667 HO2S Low Signal [- Bank 2 Sensor 2]
26 TAN 413 HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)
27 - - Not Used
28 TAN/WHT 1669 HO2S Low Signal [- Bank 1 Sensor 2]
28 TAN 413 HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)
29 TAN/WHT 1653 HO2S Low Signal [- Bank 1 Sensor 1]
29 TAN 413 HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)
30 LT GRN 1478 Coolant Level Switch Signal
31 - - Not Used
32 BLK/WHT 771 Transmission Range Switch Signal A
33 PPL 420 TCC Brake Switch Signal
34 WHT 776 Transmission Range Switch Signal P
35 GRA 48 CPP Switch Signal
36 BLK 1744 Injector 1 Control
37 YEL/BLK 846 Injector 6 Control
38 PNK/WHT 1101 Damping Lift/Dive Signal
39 - - Not Used
40 BLK/WHT 451 Ground
41 BLK 407 Low Reference
41 GRA 720 Low Reference (w/o Delphi HO2S)
42 - - Not Used
43 RED/BLK 877 Fuel Injector 7 Control
44 LT BLU/BLK 844 Fuel Injector 4 Control
45 GRA 474 5 Volt Reference (FTP Sensor)
46 GRY 474 5 Volt Reference (TPS Sensor)
47 GRY 597 5 Volt Reference (MAP Sensor)
48 GRA 596 5 Volt Reference (EGR Sensor)
49 50 - - Not Used
51 DK BLU 496 KS [1] Signal
52 - - Not Used
53 BLK 470 Low Reference
54 BLK 452 Low Reference
55 BRN 1456 EGR Valve Position Signal
56 - - Not Used
57 ORN 440 Battery Positive Voltage
58 DK GRN 1049 ECM/PCM/VCM Class 2 Serial Data
59 YEL 710 Class 2 Serial Data
60 ORN/BLK 469 Low Reference
61 PNK/BLK 632 Low Reference
62 - - Not Used
63 GRA 720 Low Reference
63 TAN 413 HO2S Low Reference (Denso Sensors) HO2S Low Signal (Delphi Sensors)
64 - - Not Used
65 PPL 1670 HO2S High Signal [- Bank 2 Sensor 2]
66 PPL 1666 HO2S High Signal [- Bank 2 Sensor 1]
67 - - Not Used
68 PPL/WHT 1668 HO2S High Signal [- Bank 1 Sensor 2]
69 PPL/WHT 1665 HO2S High Signal [- Bank 1 Sensor 1]
70 BRN 1174 Oil Level Switch Signal
71 - - Not Used
72 YEL 772 Transmission Range Switch Signal B
73 BRN/WHT 633 CMP Sensor Signal
74 YEL 410 ECT Sensor Signal
75 PNK 1020 Off/Run/Crank Voltage
76 BLK/WHT 845 Fuel Injector 5 Control
77 DK BLU/WHT 878 Fuel Injector 8 Control
78 - - Not Used
79 WHT 687 3-2 Shift Solenoid Valve Control
80 ORN/BLK 510 Low Reference