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HOMESERVICE MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 47 (ENGINE CONTROLS - 6.6L - COMPONENT LOCATOR)COMPONENT LOCATORENGINE CONTROL MODULE CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) - C1 (BLUE)
2001 Chevrolet Suburban C1500

Engine Control Module (ECM) - C1 (Blue)

2001 Chevrolet Suburban C1500SECTION Engine Control Module (ECM) - C1 (Blue)
WARNING: This page is about a different car, the 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, 2001 Chevrolet Silverado, and 2001 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Engine Control Module (ECM) - C1 (Blue)

GM655733
Connector Part Information
  • 12191489
  • 80-Way F Micro-Pack 100W Sealed (NAT)
Pin Wire Color Circuit No. Function
1 BLK/WHT 451 Ground
2 LT GRN 1867 12 Volt Reference
3 BLK 1744 Fuel Injector 1 Control
4 LT BLU /BLK 844 Fuel Injector 4 Control
5 6 - - Not used
7 YEL/BLK 975 5 Volt Reference
8 - - Not used
9 DK GRN 2362 CAN Serial Data Signal Low
10 YEL 2361 CAN Serial Data Signal High
11 - - Not Used
12 LT BLU/WHT 1869 CKP Sensor Signal
13 16 - - Not Used
17 YEL/BLK 508 Water In Fuel Indicator Control
18 DK BLU 84 Cruise Control Set/Coast Switch Signal
19 PNK 439 Ignition 1 Voltage
20 ORN 440 Battery Positive Voltage
21 YEL/BLK 1868 Low Reference
22 GRY/BLK 87 Cruise Control Resume/Accel Switch Signal
23 24 - - Not used
25 ORN/BLK 469 Low Reference
26 28 - - Not Used
29 TAN 986 IA Heater Supply Voltage
30 LT GRN 1478 Coolant Level Switch Signal
31 - - Not Used
32 BRN 2524 Generator 2 Turn On Signal
33 - - Not Used
34 ORN/BLK 1786 Park/Neutral Signal
35 GRY 48 CCP Switch Signal
36 LT GRN/BLK 1745 Fuel Injector 2 Control
37 BLK/WHT 845 Fuel Injector 5 Control
38 39 - - Not used
40 BLK/WHT 451 Ground
41 BRN 971 Low Reference
42 - - Not Used
43 DK BLU/WHT 878 Fuel Injector 8 Control
44 PNK/BLK 1746 Fuel Injector 3 Control
45 TAN 1274 5 Volt Reference
46 WHT/BLK 2932 5 Volt Reference
47 WHT/BLK 1164 5 Volt Reference
48 TAN 2917 5 Volt Reference
49 51 - - Not Used
52 LT BLU 506 Glow Plug Signal
53 - - Not Used
54 PPL 1272 Low Reference
55 LT BLU 1162 Low Reference
56 - - Not Used
57 ORN 440 Battery Positive Voltage
58 DK GRN 1049 ECM/PCM Class 2 Serial Data
59 YEL 710 Class 2 Serial Data
60 - - Not Used
61 PNK/BLK 632 Low Reference
62 LT GRN 1324 Backup Lamp Supply Voltage
63 - - Not Used
64 BLK 552 Low Reference
65 GRY 1273 Low Reference
66 69 - - Not Used
70 BRN 1174 Oil Level Switch Signal
71 LT GRN 488 PTO Enable
72 - - Not Used
73 BRN/WHT 633 CMP Sensor Signal
74 YEL 410 ECT Sensor Signal
75 PNK 1020 Off/Run/Crank Voltage
76 YEL/BLK 846 Fuel Injector 6 Control
77 RED/BLK 877 Fuel Injector 7 Control
78 PPL 985 IA Heater Relay Control
79 GRY/BLK 2219 FICM Relay Control
80 GRY 720 Low Reference
RENDER: 1.0x

NO RELATED

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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.