2007 Chevrolet Suburban C1500, 5.3 0FACTORY OEM SERVICE PROCEDURE

Engine Control Module (ECM) C1

Fig 1: Engine Control Module (ECM) C1 Connector End View
GM1715237Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) C1 Connector Parts Information

Connector Part Information 
  • OEM: 15499466
  • Service: 88988931
  • Description: 73-Way F Receptacle 0.64 Sealed (BK)
Terminal Part Information 
  • Pins: 73
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
  • Release Tool/Test Probe: 12094430/J-35616-4A (PU)
  • Pins: 1, 12-13, 16-17, 23-24, 29-36, 50-52, 56-59, 63, 68, 70-71
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 2, 9-11, 18-20, 27-28, 37-38, 41, 47, 49, 61, 64-65, 69
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) C1 Connector Terminal Identification

Pin Wire Color Circuit No. Function
1 OG/BK 1786 Park/Neutral Signal
2 GY/BK 1694 4WD Low Signal
3-8 - - Not Used
9 L-BU/WH 6311 Brake Switch Signal
10 PU/WH 1668 HO2S High Signal - Bank 1 Sensor 2
11 TN/WH 1669 HO2S Low Signal - Bank 1 Sensor 2
12 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
13 TN 5514 Low Reference
14-15 - - Not Used
16 PU 1589 Fuel Level Sensor Signal - Primary
17 D-BU/WH 473 High Speed Cooling Fan Relay Control
18 D-BU 5985 Accessory Wakeup Serial Data
19 PK 439 Ignition 1 Voltage
20 RD/WH 440 Battery Positive Voltage
21-22 - - Not Used
23 PU 1272 Low Reference
24 D-GN 890 Fuel Tank Pressure Sensor Signal
25-26 - - Not Used
27 TN 2501 High Speed GMLAN Serial Data Bus -
28 TN/BK 2500 High Speed GMLAN Serial Data Bus +
29 D-BU 1161 APP Sensor 1 Signal
30 BN 1271 Low Reference
31 TN/BK 6049 Low Reference
32 L-BU 1162 APP Sensor 2 Signal
33 GY 2709 5-Volt Reference
34 GY/WH 2700 5-Volt Reference
35 - - Not Used
36 TN 1274 5-Volt Reference
37 TN/BK 472 IAT Sensor Signal
38 TN 2760 Low Reference
39-40 - - Not Used
41 YE 492 MAF Sensor Signal
42-46 - - Not Used
47 PK/BK 1339 Ignition 1 Voltage
48 - - Not Used
49 TN 1671 HO2S Low Signal - Bank 2 Sensor 2
50 D-GN/WH 465 Fuel Pump Relay Control - Primary
51 TN 1465 Fuel Pump Relay Control - Secondary (Except NQZ)
52 YE/BK 625 Starter Enable Relay Control
53-55 - - Not Used
56 WH/BK 1164 5-Volt Reference
57 YE/BK 1827 Vehicle Speed Signal
58 D-GN 335 Low Speed Cooling Fan Relay Control
59 YE 5991 Powertrain Relay Coil Control
60 - - Not Used
61 WH 1310 EVAP Canister Vent Solenoid Control
62 - - Not Used
63 D-GN/WH 459 A/C Compressor Clutch Relay Control
64 OG/WH 3223 HO2S Heater Low Control (Bank 2 Sensor 2)
65 GY/WH 3122 HO2S Heater Low Control - Bank 2 Sensor 1
66-67 - - Not Used
68 BN/WH 419 MIL Control
69 PU 1670 HO2S High Signal - Bank 2 Sensor 2
70 L-BU 1937 Secondary Fuel Level Sensor Signal
71 OG/BK 6399 Replicated TOS Signal
72 - - Not Used
73 BK/WH 451 Ground
Factory Service Tools

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When to See a Mechanic

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.

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