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HOMESERVICE MANUALSCHEVROLET2006IMPALA LTZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 2 (ENGINE CONTROL SYSTEM - 5.3L - INTRODUCTION (2 OF 2))VISUAL IDENTIFICATIONENGINE CONTROL MODULE (ECM) CONNECTORSENGINE CONTROL MODULE (ECM) C1
2006 Chevrolet Impala LTZ

Engine Control Module (ECM) C1

2006 Chevrolet Impala LTZSECTION Engine Control Module (ECM) C1
WARNING: This page is about a different variant/trim than selected.
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
RENDER: 1.0x

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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.