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.
Transmission Control Module (TCM) (M30 or M70)
2006 Chevrolet Suburban C1500, 5.3 ZSECTION Transmission Control Module (TCM) (M30 or M70)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Transmission Control Module (TCM) (M30 or M70)
| Pin | Wire Color | Circuit | Function |
|---|---|---|---|
| 1 | 0.5 BN | 418 | TCC PWM Solenoid Valve Control |
| 2 | 0.5 L-GN | 1222 | 1-2 Shift Solenoid Valve Control |
| 3 | 0.35 OG | 1983 | Input Shaft Speed (ISS) Signal |
| 4 | - | - | Not Used |
| 5 | 0.35 OG/BK | 6399 | Replicated TOS Signal |
| 6 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus - |
| 7 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus + |
| 8-10 | - | - | Not Used |
| 11 | 0.35 D-BU | 5985 | Accessory Wake Up Serial Data |
| 12-13 | - | - | Not Used |
| 14 | 0.5 WH | 687 | 3-2 Shift Solenoid Valve Control |
| 15 | - | - | Not Used |
| 16 | 0.5 L-GN/BK | 822 | VSS High Signal |
| 17 | 0.5 L-BU/WH | 1229 | PC Solenoid Valve Low Control |
| 18-19 | - | - | Not Used |
| 20 | 0.5 YE/BK | 1223 | 2-3 Shift Solenoid Valve Control |
| 21-22 | - | - | Not Used |
| 23 | 0.35 GY | 773 | Transmission Range Switch Signal C |
| 24 | 0.35 PK | 1224 | Transmission Fluid Pressure Switch Signal A |
| 25 | 0.5 TN/BK | 422 | TCC Solenoid Valve Control |
| 26-28 | - | - | Not Used |
| 29 | 0.35 TN/WH | 771 | Transmission Range Switch Signal A |
| 30 | 0.35 TN | 2762 | Low Reference |
| 31 | 0.5 PK | 2139 | Ignition Voltage |
| 32 | 0.5 RD/WH | 1840 | Battery Positive Voltage |
| 33 | 0.35 OG | 1226 | Transmission Fluid Pressure Switch Signal C |
| 34 | - | - | Not Used |
| 35 | 0.5 YE/BK | 1227 | Transmission Fluid Temperature (TFT) Sensor Signal |
| 36 | - | - | Not Used |
| 37 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus - |
| 38 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus + |
| 39 | 0.35 WH | 776 | Transmission Range Switch Signal P |
| 40 | 0.5 OG/BK | 1228 | Pressure Control (PC) Solenoid Valve High Control |
| 41 | 0.5 PU/WH | 821 | VSS Low Signal |
| 42 | 0.5 L-BU/WH | 6311 | Brake Switch Signal |
| 43 | - | - | Not Used |
| 44 | 0.35 D-BU | 1225 | Transmission Fluid Pressure Switch Signal B |
| 45 | 0.35 L-BU | 1984 | Low Reference |
| 46 | 0.35 YE | 772 | Transmission Range Switch Signal B |
| 47-48 | - | - | Not Used |
| 49 | 0.8 BK/WH | 451 | Ground |
Connector Part Information
Terminal Part Information
|
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.