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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2171 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEW 2 OF 5)ENGINE CONTROL MODULE (ECM) X3 (HP2)
2006 Chevrolet Suburban C1500, 5.3 Z

Engine Control Module (ECM) X3 (HP2)

2006 Chevrolet Suburban C1500, 5.3 ZSECTION Engine Control Module (ECM) X3 (HP2)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) X3 (HP2) Connector End View
GM1590596Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) X3 (HP2)

Pin Wire Color Circuit Function
1-2 - - Not Used
3 0.5 TN 1667 HO2S Low Signal - Bank 2 Sensor 1
4 0.5 PU 1666 HO2S High Signal - Bank 2 Sensor 1
5 0.5 PU 1670 HO2S High Signal - Bank 2 Sensor 2
6 0.5 TN 1671 HO2S Low Signal - Bank 2 Sensor 2
7 - - Not Used
8 0.5 D-BU 942 Low Temperature Cooling Pump Motor Ground
9 - - Not Used
10 0.35 GY 5493 Valve Lifter Oil Manifold (VLOM) Assembly Cylinder 6 Shutoff Solenoid
11 0.35 D-BU 5491 Valve Lifter Oil Manifold (VLOM) Assembly Cylinder 1 Shutoff Solenoid
12 - - Not Used
13 0.5 D-BU 941 Low Temperature Cooling Pump Motor Ground
14 - - Not Used
15 0.5 L-GN 3212 HO2S Heater Low Control - Bank 2 Sensor 1
16-17 - - Not Used
18 0.5 BN 1174 Oil Level Switch Signal
19-20 - - Not Used
21 0.35 TN 5514 Low Reference
22 0.8 OG/BK 469 Low Reference
23 0.5 OG/BK 469 Low Reference
24-32 - - Not Used
33 0.5 L-BU 6106 PTLAN -
34 - - Not Used
35 0.5 TN 2761 Low Reference
36 0.5 TN 955 Low Reference
37 0.35 GY 2700 5-Volt Reference
38 0.8 GY 2704 5-Volt Reference
39 0.5 GY 2704 5-Volt Reference
40-46 - - Not Used
47 0.5 TN 2501 High Speed GMLAN Serial Data Bus -
48 0.5 D-GN/WH 428 EVAP Canister Purge Solenoid Control
49 0.35 D-BU 473 Low Speed Cooling Fan Relay Control
50 0.5 OG/WH 3223 HO2S Heater Low Control - Bank 2 Sensor 2
51 0.5 TN 2501 High Speed GMLAN Serial Data Bus -
52 0.5 TN 2501 High Speed GMLAN Serial Data Bus -
53 0.5 D-BU 6105 PTLAN +
54 - - Not Used
55 0.5 YE 410 Engine Coolant Temperature
(ECT) Sensor Signal
56 0.5 YE 954 5-Volt Reference
57 0.35 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
58 0.8 L-GN 432 Barometric Pressure Sensor Signal
59 0.5 L-GN 432 Manifold Absolute Pressure (MAP) Sensor Signal
60-65 - - Not Used
66 0.35 OG/BK 6399 Vehicle Speed Signal (2WD)
0.5 PU/WH 821 Vehicle Speed Sensor (VSS) High Signal (4WD)
67 0.5 L-GN/BK 822 Vehicle Speed Sensor (VSS) Low Signal
68 0.35 L-GN 5492 Valve Lifter Oil Manifold (VLOM) Assembly Cylinder 7 Shutoff Solenoid
69 0.35 OG 5494 Valve Lifter Oil Manifold (VLOM) Assembly Cylinder 4 Shutoff Solenoid
70 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus +
71 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus +
72 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus +
73 3 BK/WH 451 Ground
Connector Part Information 
  • OEM: 15497996
  • Service: 88988372
  • Description: 73-Way F 0.64 2.8 Series, Sealed (BK)
Terminal Part Information 
  • Pins: 73
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
  • Release Tool/Test Probe: 12094430/J-35616-35 (VT)
  • Pins: 10, 11, 21, 37, 49, 57, 66, 68, 69
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 3-8, 13-18, 22-36, 38, 39, 47, 48, 50-56, 58, 59, 66, 67, 70-72
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 3-18, 23, 33-36, 39-56, 59-72 - J/J
  • Core/Insulation Crimp: Pins 22, 38, 58 - K/K
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • 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.
  • • You are not confident in the next step or safety outcome.