2006 Chevrolet Impala SSFACTORY OEM SERVICE PROCEDURE

Engine Control Module (ECM) C1

Fig 1: Connector End Views
GM1581642Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) Connector End Views

Connector Part Information 
  • OEM: 13551263
  • Service: 88953346
  • Description: 56-Way F Micro-Pack 0.64 Series, Sealed (BU)
Terminal Part Information 
  • Terminal/Tray: 15359541/4
  • Core/Insulation Crimp: M/M
  • Release Tool/Test Probe: 15381651-2/J-35616-64A (L-BU)
Engine Control Module (ECM) C1

Pin Wire Color Circuit No. Function
1 TN/BK 2500 High Speed GMLAN Serial Data Bus+
2 TN 2501 High Speed GMLAN Serial Data Bus-
3 - - Not Used
4 BN/WH 419 MIL Control
5-6 - - Not Used
7 PU 1272 Low Reference
8 WH/BK 1164 5-Volt Reference
9 - - Not Used
10 BN 5069 Main Relay Control
11-13 - - Not Used
14 PK/BK 5290 Ignition 1 Voltage
15-17 - - Not Used
18 D-BU 5985 Accessory Wake Up Serial Data
19 PK 439 Ignition 1 Voltage
20 RD/WH 540 Battery Positive Voltage
21 - - Not Used
22 L-BU 1162 APP Sensor 2 Signal
23 - - Not Used
24 D-GN 890 Fuel Tank Pressure Sensor Signal
25 - - Not Used
26 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
27-28 - - Not Used
29 BN 1271 Low Reference
30 GY 2700 A/C Pressure Sensor 5 Volt Reference
31 GY 2709 5-Volt Reference
32 WH 17 Stop Lamp Switch Signal
33-34 - - Not Used
35 TN 1274 5-Volt Reference
36 D-GN 335 Low Speed Cooling Fan Relay Control
37 PU 30 Fuel Level Sensor Signal
38-40 - - Not Used
41 D-BU 1161 APP Sensor 1 Signal
42-44 - - Not Used
45 D-GN/WH 465 Fuel Pump Relay Control [- Primary]
46-53 - - Not Used
54 WH 1310 EVAP Canister Vent Solenoid Control
55 BK/WH 2751 Low Reference
56 L-BU 473 High Speed Cooling Fan Relay Control
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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