Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C1500, 5.3 ZREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 676 (ENGINE CONTROLS - 6.6L - INTRODUCTION (2 OF 2))COMPONENT LOCATORENGINE CONTROL MODULE (ECM) CONNECTORSENGINE CONTROL MODULE (ECM) - C2
2006 Chevrolet Suburban C1500, 5.3 Z
Engine Control Module (ECM) - C2
2006 Chevrolet Suburban C1500, 5.3 ZSECTION Engine Control Module (ECM) - C2
WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Engine Control Module (ECM) - C2
Connector Part Information
|
|||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | PK | 339 | Ignition 1 Voltage |
| 2 | BK/WH | 451 | Ground |
| 3 | PK | 339 | Ignition 1 Voltage |
| 4 | BK/WH | 451 | Ground |
| 5 | PK | 339 | Ignition 1 Voltage |
| 6 | BK/WH | 451 | Ground |
| 7-8 | - | - | Not Used |
| 9 | D-GN | 1049 | Class 2 Serial Data |
| 10-11 | - | - | Not Used |
| 12 | D-GN/WH | 465 | Fuel Pump Relay Control |
| 13 | BK | 2751 | Low Reference |
| 14 | - | - | Not Used |
| 15 | WH/BK | 1164 | 5-Volt Reference |
| 16 | D-BU | 507 | Wait to Start Indicator Control |
| 17 | - | - | Not Used |
| 18 | PU | 2562 | PTO Control (PTO) |
| 19 | GY/BK | 2219 | ECM Relay Control |
| 20 | - | - | Not Used |
| 21 | PK | 439 | Ignition 1 Voltage |
| 22 | L-BU | 1320 | CHMSL Supply Voltage |
| 23 | BN | 25 | Charge Indicator Control |
| 24 | BN | 2524 | Generator 2 Turn On Signal (8X5/YF2) |
| 25-26 | - | - | Not Used |
| 27 | GY | 2700 | 5-Volt Reference |
| 28 | - | - | Not Used |
| 29 | BN | 1271 | Low Reference |
| 30 | BN/WH | 419 | MIL Control |
| 31 | D-GN/WH | 459 | A/C Compressor Clutch Relay Control |
| 32 | - | - | Not Used |
| 33 | OG/BK | 5764 | EGR Motor High Control |
| 34 | BK | 470 | Low Reference |
| 35 | RD/BK | 380 | A/C Refrigerant Pressure Sensor Signal |
| 36 | PU/WH | 1589 | Fuel Level Sensor Signal - Primary |
| 37 | - | - | Not Used |
| 38 | GY | 23 | Generator Field Duty Cycle Signal |
| 39 | OG/BK | 1786 | Park/Neutral Signal (MW7) |
| 40 | PU | 420 | TCC Brake Switch/Cruise Control Release Switch Signal |
| 41 | - | - | Not Used |
| 42 | D-GN/WH | 817 | Vehicle Speed Signal |
| 43 | - | - | Not Used |
| 44 | TN | 2501 | High Speed GMLAN Serial Data Bus - |
| 45 | PU/WH | 821 | VSS High Signal (ML6) |
| YE | 400 | VSS High Signal (MW7) | |
| 46 | L-GN/BK | 5746 | EGR Motor Low Control |
| 47 | BN | 6062 | Low Reference |
| 48 | YE | 1578 | Fuel Temperature Signal |
| 49 | D-BU | 1161 | APP Sensor 1 Signal |
| 50 | D-BU | 1936 | Fuel Level Sensor Signal - Secondary (Except NQZ) |
| 51-53 | - | - | Not Used |
| 54 | YE/BK | 1827 | Vehicle Speed Signal |
| 55 | WH | 121 | Engine Speed Signal |
| 56 | PK | 1020 | Ignition 0 Voltage |
| 57 | TN/WH | 2500 | High Speed GMLAN Serial Data Bus + |
| 58 | L-GN/BK | 822 | VSS Low Signal (ML6) |
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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.