2006 Chevrolet Impala SSFACTORY OEM SERVICE PROCEDURE

Engine Control Module (ECM) C2

Fig 1: Connector End Views
GM1581643Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) Connector End Views

Connector Part Information 
  • OEM: 13551267
  • Service: 88953274
  • Description: 73-Way F GT 280 Micro-Pack 0.64 Series, Sealed (BK)
Terminal Part Information 
  • Pins: 2 - 72
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64A (L-BU)
  • Pins: 73
  • Terminal/Tray: 15304720/19
  • Core/Insulation Crimp: 4/5
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
Engine Control Module (ECM) C2

Pin Wire Color Circuit No. Function
1 - - Not Used
2 GY 3113 HO2S Heater Low Control [- Bank 1 Sensor 1]
3 - - Not Used
4 D-BU/WH 878 Fuel Injector 8 Control
5 TN 1744 Fuel Injector 1 Control
6 L-GN/BK 1745 Fuel Injector 2 Control
7 OG/BK 877 Fuel Injector 7 Control
8 L-BU/BK 844 Fuel Injector 4 Control
9 PK/BK 1746 Fuel Injector 3 Control
10 TN/WH 845 Fuel Injector 5 Control
11-12 - - Not Used
13 YE/BK 846 Fuel Injector 6 Control
14 YE/BK 1868 Low Reference
15 PK/BK 632 Low Reference
16 BN 2129 Low Reference
17 OG 5494 Cylinder Shutoff Solenoid Control 4
18 TN 5496 Cylinder Shutoff Solenoid Control 3
19 - - Not Used
20 OG/BK 469 Low Reference
21 BK 2755 Low Reference
22 YE 447 Starter Relay Coil Control
23 - - Not Used
24 TN/WH 331 Oil Pressure Sensor Signal
25 - - Not Used
26 BN/WH 633 CMP Sensor Signal
27 BN 1174 Oil Level Switch Signal
28 - - Not Used
29 PU 486 TP Sensor 2 Signal
30 - - Not Used
31 D-GN 485 TP Sensor 1 Signal
32 - - Not Used
33 D-BU 5491 Cylinder Shutoff Solenoid Control 1
34 WH 5497 Cylinder Shutoff Solenoid Control 2
35 GY 2704 5-Volt Reference
36 TN 2752 Low Reference
37 GY 2705 5-Volt Reference
38 - - Not Used
39 L-BU/BK 6297 Low Reference
40 L-BU 6295 5-Volt Reference 2
41 GY 2701 5-Volt Reference
42 - - Not Used
43 L-GN 1867 12-Volt Reference
44 OG 631 12-Volt Reference
45 GY 23 Generator Field Duty Cycle Signal
46 L-GN 432 MAP Sensor Signal
47 - - Not Used
48 PU/WH 1665 HO2S High Signal [- Bank 1 Sensor 1]
49 TN 1664 HO2S Low Signal [- Bank 1 Sensor 1]
50 D-GN/WH 428 EVAP Canister Purge Solenoid Control
51 - - Not Used
52 TN 2761 Low Reference
53 OG 2127 IC 7 Control
54 PU 2121 IC 1 Control
55 YE 410 ECT Sensor Signal
56 OG 225 Generator Turn On Signal
57 L-BU/WH 2126 IC 6 Control
58 D-GN/WH 2124 IC 4 Control
59 D-GN 2125 IC 5 Control
60 BN 582 TAC Motor Control - 2
61 L-BU 2123 IC 3 Control
62 D-BU/WH 1869 CKP Sensor Signal
63 YE 581 TAC Motor Control - 1
64 BN/WH 2130 Low Reference
65 PU/WH 2128 IC 8 Control
66 OG/WH 2122 IC 2 Control
67 - - Not Used
68 D-BU 496 Knock Sensor [1] Signal
69 GY 1716 Low Reference
70 - - Not Used
71 GY 2303 Low Reference
72 L-BU 1876 Knock Sensor 2 Signal
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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