2007 Chevrolet Impala LS, 3.5 NFACTORY OEM SERVICE PROCEDURE

Engine Control Module (ECM) Connector End View C3

Fig 1: Engine Control Module (ECM) C3 Connector End View
GM1590596Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) C3 Connector Parts Information

Connector Part Information 
  • OEM: 15497996
  • Service: 88988361
  • Description: 73-Way F 0.64 2.8 Series, Sealed (BK)
Terminal Part Information 
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)
Engine Control Module (ECM) C3 Connector Terminal Identification

Pin Wire Color Circuit No. Function
1-6 - - Not Used
7 OG 225 Generator Turn On Signal
8-9 - - Not Used
10 TN 5496 Cylinder Shutoff Solenoid Control 3
11 D-BU 5491 Cylinder Shutoff Solenoid Control 1
12-17 - - Not Used
18 BN 1174 Oil Level Switch Signal
19-20 - - Not Used
21 BK/WH 2751 Low Reference
22 - - Not Used
23 OG/BK 469 Low Reference
24-27 - - Not Used
28 L-BU/BK 6297 Low Reference
29 GY 23 Generator Field Duty Cycle Signal
30-32 - - Not Used
33 TN 2501 High Speed GMLAN Serial Data Bus -
34 - - Not Used
35 TN 2761 Low Reference
36 - - Not Used
37 GY 2700 5-Volt Reference 1
38 - - Not Used
39 GY 2704 5-Volt Reference 1
40-43 - - Not Used
44 L-BU 6295 5-Volt Reference 2
45 - - Not Used
46 OG/BK 1786 Park/Neutral Signal
47 - - Not Used
48 D-GN/WH 428 EVAP Canister Purge Solenoid Control
49 D-GN 335 Low Speed Cooling Fan Relay Control
50-52 - - Not Used
53 TN/BK 2500 High Speed GMLAN Serial Data Bus +
54 - - Not Used
55 YE 410 ECT Sensor Signal
56 - - Not Used
57 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
58 - - Not Used
59 L-GN 432 MAP Sensor Signal
60-65 - - Not Used
66 OG 381 Vehicle Speed Signal
67 - - Not Used
68 WH 5497 Cylinder Shutoff Solenoid Control 2
69 OG 5494 Cylinder Shutoff Solenoid Control 4
70-73 - - Not Used
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.