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Home >> Chevrolet >> 2008 >> TrailBlazer 4.2 S, RWD >> Repair and Diagnosis (Single Page) >> Quick Lookups >> Electrical Component Locations >> Wiring Systems And Power Management - Component Views & Connector End Views >> Component Connector End Views >> Engine Control Module (ECM) X2

Engine Control Module (ECM) X2

Fig 1: Engine Control Module (ECM) X2 Connector End View
GM1673472Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X2

Pin Wire Circuit Function
1 0.5 PU 2121 IC 1 Control
2 0.5 TN 1664 HO2S Low Signal - Bank 1 Sensor 1
3 0.5 PU/WH 1665 HO2S High Signal - Bank 1 Sensor 1
4 0.5 PU/WH 1668 HO2S High Signal - Bank 1 Sensor 2
5 0.5 TN/WH 1669 HO2S Low Signal - Bank 1 Sensor 2
6 0.35 L-BU 1876 KS 2 Signal
7 0.35 GY 2303 KS 2 Signal
8 0.35 D-BU 496 KS 1 Signal
9 0.35 GY 1716 KS 1 Signal
10 - - Not Available
11 0.5 YE 581 TAC Motor Control 1
12 0.5 BN 582 TAC Motor Control 2
13 0.5 PK 839 Ignition Voltage
14 0.35 BN 2198 Camshaft Position Actuator Solenoid High Control (4.2L)
15 - - Not Available
16 0.5 PK/BK 1746 Fuel Injector 3 Control (5.3L, 6.0L)
17 0.5 PU/WH 2128 IC 5 Control (4.2L)
0.5 PU/WH 2128 IC 8 Control (5.3L, 6.0L)
18 0.5 D-GN/WH 2124 IC 4 Control (5.3L, 6.0L)
19 0.5 BN/WH 2130 Low Reference (5.3L, 6.0L)
20-22 - - Not Available
23 0.35 PK/BK 632 Low Reference
24 0.35 PU 114 Low Oil Pressure Switch Signal (4.2L)
0.35 BK 2755 Low Reference (5.3L, 6.0L)
25-26 - - Not Available
27 0.5 BK 407 Low Reference (4.2L)
0.35 YE/BK 1868 Low Reference (5.3L, 6.0L)
28 - - Not Available
29 0.35 D-GN/WH 1704 Low Reference
30-31 - - Not Available
32 0.5 YE/BK 846 Fuel Injector 6 Control (4.2L)
0.5 L-GN/BK 1745 Fuel Injector 2 Control (5.3L, 6.0L)
33 0.5 L-BU 2123 IC Control (4.2L)
0.5 RD 2127 IC 7 Control (5.3L, 6.0L)
34 0.5 D-GN/WH 2124 IC 4 Control (4.2L)
0.5 D-GN 2125 IC 5 Control (5.3L, 6.0L)
35 0.5 BN 2129 Low Reference (5.3L, 6.0L)
36-38 - - Not Available
39 0.35 RD 631 12-Volt Reference
40 0.35 GY 2705 5-Volt Reference (5.3L, 6.0L)
41 - - Not Available
42 0.5 BK 2760 Low Reference
43 0.35 YE 6259 Starter Enable Relay Control (4.2L)
0.35 L-GN 1867 12-Volt Reference (5.3L, 6.0L)
44 0.35 GY 2701 5-Volt Reference (4.2L)
0.35 L-BU/BK 1688 5-Volt Reference (5.3L, 6.0L)
45 - - Not Available
46 0.35 BK 2199 Low Reference (4.2L)
47 - - Not Available
48 0.5 BK/WH 845 Fuel Injector 5 Control (4.2L)
0.5 D-BU/WH 878 Fuel Injector 8 Control (5.3L, 6.0L)
49 0.5 L-BU/BK 844 Fuel Injector 4 Control (4.2L)
0.5 BK/WH 845 Fuel Injector 5 Control (5.3L, 6.0L)
50-51 - - Not Available
52 0.5 L-GN/BK 1745 Fuel Injector 2 Control (4.2L)
0.5 YE/BK 846 Fuel Injector 6 Control (5.3L, 6.0L)
53 0.5 L-BU/WH 2122 IC 6 Control (4.2L)
0.5 RD/WH 2122 IC 2 Control (5.3L, 6.0L)
54 0.35 RD/WH 2122 IC 2 Control (4.2L)
0.5 L-BU/WH 2126 IC 6 Control (5.3L, 6.0L)
55 0.5 L-BU 2123 IC 3 Control (4.3L, 6.0L)
56-58 - - Not Available
59 0.35 BK 630 CMP Sensor Signal (4.2L)
0.35 BN/WH 633 CMP Sensor Signal (5.3L, 6.0L)
60 0.35 TN/WH 332 Oil Pressure Sensor Signal (5.3L, 6.0L)
61 - - Not Available
62 0.5 TN 472 IAT Sensor Signal
63 0.5 BN/WH 633 CKP Sensor Signal (4.2L)
0.35 D-BU/WH 1869 CKP Sensor Signal (5.3L, 6.0L)
64 0.35 D-GN 485 TP Sensor 1 Signal
65 - - Not Available
66 0.35 PU 486 TP Sensor 2 Signal
67 0.50 YE 492 MAF Sensor Signal
68 0.5 D-GN 676 HO2S Heater Low Control - Bank 1 Sensor 1 (4.2L)
0.5 BK/WH 3113 HO2S Heater Low Control - Bank 1 Sensor 1 (5.3L, 6.0L)
69 0.5 BK/WH 1423 HO2S Heater Low Control - Bank 1 Sensor 2 (4.2L)
0.5 BN 2391 HO2S Heater Low Control - Bank 1 Sensor 2 (5.3L, 6.0L)
70 0.5 L-BU/BK 844 Fuel Injector 4 Control (5.3L, 6.0L)
71 0.5 PK/BK 1746 Fuel Injector 3 Control (4.2L)
0.5 RD/BK 877 Fuel Injector 7 Control (5.3L, 6.0L)
72 0.5 BK 1744 Fuel Injector 1 Control
73 3 BK/WH 451 Ground (4.2L)
3 BK 451 Ground (5.3L, 6.0L)
Connector Part Information 
  • OEM: 13574286
  • Service: 88988931
  • Description: 48-Way F Receptacle 0.64 Series Sealed (BK)
Terminal Part Information- 
  • Pins: 1-5, 11-13, 16-19, 32-35, 42, 48-49, 52-55, 62, 67-72
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 6-9, 23-24, 27, 29, 39-40, 43-44, 59-60, 63-64, 66
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 73
  • Terminal/Tray: See Terminal Repair Kit
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit
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