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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) - C2 (RED)
2001 Chevrolet Suburban C1500

Engine Control Module (ECM) - C2 (RED)

2001 Chevrolet Suburban C1500SECTION Engine Control Module (ECM) - C2 (RED)
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) - C2 (RED)

GM684875
Connector Part Information
  • 12191488
  • 80-Way F Micro-Pack 100W Sealed (NAT)
Pin Wire Color Circuit No. Function
1 BLK/WHT 451 Ground
2 5 - - Not Used
6 YEL 505 Glow Plug Relay Control
7 8 - - Not Used
9 DK GRN /WHT 465 Fuel Pump Relay Control [- Primary]
10 WHT 121 Engine Speed Signal
11 DK BLU 604 A/C High Pressure Recirculation Switch Signal
12 DK GRN 1163 APP Sensor 3 Signal
13 YEL 2522 PTO Feedback Status
14 LT GRN 432 Boost Sensor Signal
15 BRN 25 Charge Indicator Control
16 GRY 397 Cruise Control On Switch Signal
17 DK GRN/WHT 2523 A/C Request Signal
18 LT BLU 1320 CHMSL Supply Voltage
19 BLK/WHT 1695 Axle Switch Signal
20 LT GRN/BLK 822 VSS Low Signal
21 PPL/WHT 821 VSS High Signal
21 YEL 400 VSS High Signal ( Allison Transmission)
22 - - Not Used
23 ORN/BLK 2919 Low Reference
24 DK BLU 1161 APP Sensor 1 Signal
25 YEL 1578 Fuel Temperature Signal
26 28 - - Not Used
29 GRY 597 5 Volt Reference
30 32 - - Not Used
33 DK GRN 1614 Recirculation Door Control
34 DK GRN/WHT 459 A/C Clutch Relay Control
35 PNK/WHT 1101 Damping Lift/Dive Signal
36 DK BLU 506 Wait to Start Indicator Control
37 PPL 2562 PTO Engage Signal
38 - - Not Used
39 RED 631 12 Volt Reference
40 BLK/WHT 451 Ground
41 GRY/BLK 2931 Low Reference
42 PPL/WHT 2530 Fuel Pressure Regulator Solenoid Supply Voltage
43 - - Not Used
44 PNK 1039 Ignition 1 Voltage
45 - - Not Used
46 BRN/WHT 419 MIL Control
47 48 - - Not Used
49 YEL/BLK 1827 Vehicle Speed Signal
50 DK GRN/WHT 817 Vehicle Speed Signal
51 TAN 472 IAT Sensor Signal
52 GRY 23 Generator Field Duty Cycle Signal
53 DK BLU 2687 TCM MIL - Request Signal
54 PPL 1589 Fuel Level Sensor Signal [- Primary]
55 GRN DK 603 A/C Low Pressure Switch Signal
56 LT BLU 494 PTO Engine Disable
57 ORN/BLK 510 Low Reference
58 YEL 2918 FRP sensor Signal
59 PPL 420 TCC Brake Switch Signal
60 BRN 718 Low Reference
61 - - Not Used
62 TAN 986 IA Heater Supply Voltage
63 GRY/BLK 1694 4WD Low Signal
64 GRY/BLK 433 BARO Sensor Signal
65 YEL 492 MAF Sensor Signal
66 72 - - Not Used
73 BLU DK 1936 Fuel Level Sensor Signal [- Secondary]
74 75 - - Not Used
76 LT BLU 2832 Engine Speed Signal
77 YEL 2834 Fuel Pressure Regulator Solenoid Control
78 ORN/BLK 1057 Low Reference
79 80 - - Not Used
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.