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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 836 (ENGINE CONTROLS AND FUEL - 2.2L (L61) - INTRODUCTION (2 OF 2))COMPONENT LOCATORENGINE CONTROL MODULE CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) C1
2006 Chevrolet Suburban C2500, 6.0 U

Engine Control Module (ECM) C1

2006 Chevrolet Suburban C2500, 6.0 USECTION Engine Control Module (ECM) C1
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Control Module (ECM) C1 Connector End Views
GM816165Courtesy of GENERAL MOTORS CORP.
Engine Control Module (ECM) C1 Connector Parts Information

Connector Part Information 
  • OEM: 1928403379
  • Service: See Catalog
  • Description: 64-Way F Bosch Connector (BK)
Engine Control Module (ECM) C1 Connector Terminal Identification

Pin Wire Color Circuit No. Function
1 PU 420 Cruise/Brake Switch Signal
2 RD/BK 380 A/C Refrigerant Pressure Sensor Signal
3 BK 2751 Low Reference
4-9 - - Not Used
10 TN 2501 CAN Low
11 TN/WH 2500 CAN High
12 - - Not Used
13 D-GN 335 High Speed Cooling Fan Relay Control
14 - - Not Used
15 TN/BK 231 Engine Oil Pressure Switch Signal
16-17 - - Not Used
18 PU/WH 821 VSS Signal (M/T)
19 PK 639 Ignition 1 Voltage
20 OG 1440 Battery Positive Voltage
21 PU 1272 5-Volt Reference - A
22 GY 2700 5-Volt Reference - A
23 L-BU 20 Stop Lamp Switch Signal
24-28 - - Not Used
29 D-GN/WH 465 Fuel Pump Relay Control
30 BN 5069 Main Relay Control
31 WH/BK 1164 5-Volt Reference - B
32-48 - - Not Used
49 D-BU 1161 APP Sensor 1 Signal
50 GY 397 Cruise On/Off Switch Signal (K34)
51 D-BU 84 Cruise Set/Coast Switch Signal (K34)
52 - - Not Used
53 BN 1271 Low Reference
54 GY/BK 87 Cruise Resume/Accel Switch Signal (K34)
55 - - Not Used
56 D-GN 459 Low Reference
57 D-BU 473 Low Speed Cooling Fan Relay Control
58 - - Not Used
59 BN/WH 2960 Keyword Serial Data
60 - - Not Used
61 L-BU 1162 APP Sensor 2 Signal
62-63 - - Not Used
64 TN 1274 Low Reference
RENDER: 1.0x

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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.