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Engine Control Module (ECM) X1 (LZE, LZ4, LZG)

Fig 1: Engine Control Module (ECM) X1 (LZE, LZ4, LZG) Connector End View
GM1590596Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X1 (LZE, LZ4, LZG) Connector Terminal Identification

Pin Wire Circuit Function
1 0.35 OG/BK 1786 Park/Neutral Signal
2-8 - - Not Used
9 0.5 WH 17 Stop Lamp Switch Signal
10 0.5 PU 3120 HO2S High Signal Sensor 2
11 0.5 TN/WH 3121 HO2S Low Signal Sensor 2
12 0.35 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
13 0.35 TN 5514 Low Reference
14 0.5 OG/BK 6014 Low Reference (LZG)
15 0.5 GY/BK 433 BARO Sensor Signal (LZG)
16 0.35 PU 30 Fuel Level Sensor Signal
17 0.35 D-BU 473 High Speed Cooling Fan Relay Control
18 0.35 D-BU 5985 Accessory Wake Up Serial Data
19 0.35 PK 439 Ignition 1 Voltage
20 0.5 RD/WH 540 Battery Positive Voltage
21 0.35 OG 6030 Brake Booster Vacuum Signal (LZG)
22 0.35 YE/BK 6032 Low Reference (LZG)
23 0.35 PU 1272 Low Reference
24 0.35 D-GN 890 Fuel Tank Pressure Sensor Signal
25 0.35 BN 436 AIR Pump Relay Control (NU3)
26 - - Not Used
27 0.5 TN 2501 High Speed GMLAN Serial Data Bus-
28 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus +
29 0.35 D-BU 1161 APP Sensor 1 Signal
30 0.35 BN 1271 Low Reference
31 0.35 TN 2759 Low Reference
32 0.35 L-BU 1162 APP Sensor 2 Signal
33 0.35 GY 2709 5-Volt Reference 1
34 0.35 GY 2700 5-Volt Reference 1
35 0.5 WH/BK 2932 5-Volt Reference 1 (LZ8)
36 0.35 TN 1274 5-Volt Reference 1
37 0.35 TN/BK 472 IAT Sensor Signal
38 0.35 TN 2760 Low Reference
39-40 - - Not Used
41 0.35 YE 492 MAF Sensor Signal
42-46 - - Not Used
47 0.5 PK/BK 5290 Ignition 1 Voltage
48-49 - - Not Used
50 0.35 D-GN/WH 465 Fuel Pump Relay Control
51 - - Not Used
52 0.35 YE 447 Starter Relay Coil Control
53 0.35 GY 6031 5-Volt Reference 2 (LZG)
54-55 - - Not Used
56 0.35 WH/BK 1164 5-Volt Reference 2
57 - - Not Used
58 0.35 D-GN 335 Low Speed Cooling Fan Relay Control
59 0.35 BN 5069 PWR/TRN Relay Control
60 - - Not Used
61 0.35 WH 1310 EVAP Canister Vent Solenoid Control
62 - - Not Used
63 0.35 D-GN/WH 459 A/C Compressor Clutch Relay Control
64 - - Not Used
65 0.5 GY/WH 3122 HO2S Heater Low Control Sensor 2
66-67 - - Not Used
68 0.35 BN/WH 419 MIL Control
69-72 - - Not Used
73 2 BK/WH 451 Ground
Connector Part Information 
  • OEM: 13588763
  • Service: See Catalog
  • Description: 73-Way F 0.64 2.8 Series, Sealed (BK)
Terminal Part Information 
  • Pins: 7, 20
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 9, 12, 13, 18, 19, 26, 33, 34, 35, 36, 37, 40, 44, 47, 48, 49, 53, 54, 55
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
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