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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 131 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT VIEWS & COMPONENT CONNECTOR END VIEWS)COMPONENT CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) X2 (LZ4)
2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Engine Control Module (ECM) X2 (LZ4)

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Engine Control Module (ECM) X2 (LZ4)
WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) X2 (LZ4) Connector End View
GM1650398Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X2 (LZ4)

Pin Wire Circuit Function
1 - - Not Used
2 0.35 L-GN 1867 12-Volt Reference
3 0.35 GY 2701 5-Volt Reference 2
4 - - Not Used
5 0.35 BN 582 TAC Motor Control - 2
6 0.35 YE 581 TAC Motor Control - 1
7 - - Not Used
8 0.35 D-GN/WH 428 EVAP Canister Purge Solenoid Control
9-11 - - Not Used
12 0.35 GY/WH 3113 HO2S Heater Low Control (Bank 1 Sensor 1)
13 0.35 L-GN 3212 HO2S Heater Low Signal (Bank 2 Sensor 1)
14-15 - - Not Used
16 0.35 BN 2198 Camshaft Position Actuator Solenoid High Control
17 0.35 L-GN/BK 1745 Fuel Injector 2 Control
18 0.35 YE/BK 846 Fuel Injector 6 Control
19 0.35 TN/WH 845 Fuel Injector 5 Control
20 0.35 TN 1744 Fuel Injector 1 Control
21 0.35 YE 410 ECT Sensor Signal
22 0.35 TN 2761 Low Reference
23 - - Not Used
24 0.35 OG/BK 1175 Low Reference
25 - - Not Used
26 0.35 D-BU 496 KS 1 Signal
27 0.35 GY 1716 KS 1 Signal
28 - - Not Used
29 0.35 L-BU 1876 KS 2 Signal
30 0.35 GY 2303 KS 2 Signal
31 - - Not Used
32 0.35 GY 23 Generator Field Duty Cycle Signal
33 0.35 BN 1174 Oil Level Switch Signal
34 0.35 BK 2755 Low Reference
35 0.35 TN 2752 Low Reference
36 - - Not Used
37 0.35 L-BU/BK 844 Fuel Injector 4 Control
38-39 - - Not Used
40 0.35 PK/BK 1746 Fuel Injector 3 Control
41 0.35 GY 2705 5-Volt Reference 1
42 - - Not Used
43 0.35 GY 2704 5-Volt Reference 1
44 0.35 OG/WH 812 12-Volt Reference
45-49 - - Not Used
50 0.35 TN/WH 331 Oil Pressure Sensor Signal
51 - - Not Used
52 0.35 TN 2199 Low Reference
53 0.35 OG/BK 469 Low Reference
54-55 - - Not Used
56 0.35 TN/WH 3111 HO2S Low Signal (Bank 1 Sensor 1)
57 0.35 PU/WH 3110 HO2S High Signal (Bank 1 Sensor 1)
58 0.35 L-GN 432 MAP Sensor Signal
59 0.35 PU/WH 3210 HO2S Reference Voltage (Bank 2 Sensor 1)
60 0.35 TN/WH 3211 HO2S Low Reference (Bank 2 Sensor 1)
61 0.35 OG 225 Generator Turn On Signal
62 - - Not Used
63 0.35 PU 486 TP Sensor 2 Signal
64 0.35 BN/WH 633 CMP Sensor Signal
65 0.35 D-GN 485 TP Sensor 1 Signal
66 0.35 PK/BK 632 Low Reference
67 - - Not Used
68 0.35 L-BU/BK 647 Medium Resolution Engine Speed Signal
69 0.35 PU 574 Low Reference
70 0.35 PU 2121 IC 1 Control
71 0.35 OG/WH 2122 IC 2 Control
72 0.35 L-BU 2123 IC 3 Control
73-77 - - Not Used
78 0.35 YE 2174 Low Reference
79-80 - - Not Used
Connector Part Information 
  • OEM: 13542562
  • Service: See Catalog
  • Description: 80-Way F MX123 34566 Series Sealed (GY)
Terminal Part Information 
  • Pins: 2-3, 8, 12-13, 16, 21-22, 24, 32-35, 41, 43-44, 50, 52-53, 58, 61, 63-66, 68-72, 78
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 5-6, 17-20, 26-27, 29-30, 37, 40, 56-57, 59-60
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 5-6, 56-57, 59-60 - K/K
  • Core/Insulation Crimp: Pins 17-20, 26-27, 29-30, 37, 40 - J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
RENDER: 1.0x

NO RELATED

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  • • You smell fuel, burning insulation, or see smoke.
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  • • 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.