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 MANUALSCHEVROLET2006CAB & CHASSIS SILVERADO 2D PICKUP, 8.1 G, 4WD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALBODY ELECTRICALOEM CONNECTOR END VIEWSAUTOMATIC TRANSMISSION RELATED CONNECTOR END VIEWS (ALLISON)TRANSMISSION CONTROL MODULE (TCM) 80-WAY CONNECTOR END VIEW
2006 Chevrolet Cab & Chassis Silverado 2D Pickup, 8.1 G, 4WD, Automatic
Transmission Control Module (TCM) 80-Way Connector End View
2006 Chevrolet Cab & Chassis Silverado 2D Pickup, 8.1 G, 4WD, AutomaticSECTION Transmission Control Module (TCM) 80-Way Connector End View
Transmission Control Module (TCM) 80-Way Connector
Connector Part Information
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| Pin | Wire Color | Circuit No. | Function |
| 1 | - | - | Not Used |
| 2 | PU | 420 | Torque Converter Clutch (TCC) Brake Switch/Cruise Control Release Signal |
| 3-4 | - | - | Not Used |
| 5 | OG/BK | 483 | Requested Torque Signal |
| 6 | TN/WH | 2500 | High Speed GMLAN Serial Data Bus High |
| 7-8 | - | - | Not Used |
| 9 | BK/WH | 451 | Ground |
| 10 | OG | 4440 | Battery Positive Voltage |
| 11 | RD/BK | 1228 | Actuator Supply Voltage 1 (HSD1) |
| 12-13 | - | - | Not Used |
| 14 | GY | 773 | Transmission Range Switch Signal C |
| 15-16 | - | - | Not Used |
| 17 | PK | 1224 | Fluid Pressure Switch Signal 1 |
| 18 | YE | 400 | Vehicle Speed Sensor (VSS) Signal High |
| 19 | - | - | Not Used |
| 20 | L-BU | 1984 | Transmission Turbine Speed Switch Low |
| 21 | - | - | Not Used |
| 22 | WH | 2467 | Unmanaged Torque Signal |
| 23 | YE | 2522 | Power Take-Off (PTO) Engage Signal |
| 24-25 | - | - | Not Used |
| 26 | TN/WH | 2500 | High Speed GMLAN Serial Data Bus High |
| 27 | TN | 2501 | High Speed GMLAN Serial Data Bus Low |
| 28 | - | - | Not Used |
| 29 | D-BU | 2466 | Transmission Malfunction Indicator Lamp (MIL) Request Signal |
| 30-32 | - | - | Not Used |
| 33 | YE/BK | 1223 | Shift Solenoid 2 (SS2) Low |
| 34 | WH | 776 | Transmission Range Switch Signal P |
| 35 | - | - | Not Used |
| 36 | BN/WH | 2469 | Pressure Control Solenoid 2 (PCS2) Low |
| 37-38 | - | - | Not Used |
| 39 | D-BU/BK | 1231 | Automatic Transmission Input Speed Sensor (AT ISS) Signal Low |
| 40 | L-GN/BK | 822 | Vehicle Speed Sensor (VSS) Signal Low |
| 41 | - | - | Not Used |
| 42 | GY/BK | 1694 | Four Wheel Drive (4WD) Low Signal |
| 43 | PU | 806 | Crank Voltage |
| 44 | TN/BK | 464 | Delivered Torque Signal |
| 45 | - | - | Not Used |
| 46 | YE | 2470 | Class 2 Serial Data |
| 47 | L-BU | 6106 | High Speed GMLAN Serial Data Bus Low |
| 48-50 | - | - | Not Used |
| 51 | OG/WH | 2527 | Shift Solenoid 3 (SS3) Low |
| 52 | L-GN | 1222 | Shift Solenoid 1 (SS1) Low |
| 53 | YE | 772 | Transmission Range Switch Signal B |
| 54 | YE/BK | 1227 | Transmission Fluid Temperature (TFT) Sensor Signal |
| 55 | L-BU/WH | 1229 | Pressure Control Solenoid 1 (PCS1) Low |
| 56 | PU | 5526 | Driver Shift Request Signal |
| 57 | RD | 1226 | Fluid Pressure Switch Signal 3 |
| 58 | BK | 2762 | Transmission Fluid Temperature (TFT) Sensor Return |
| 59 | RD/BK | 1280 | Automatic Transmission Input Speed Sensor (AT ISS) Signal High |
| 60 | PU/WH | 821 | Vehicle Speed Sensor (VSS) Signal High |
| 61-62 | - | - | Not Used |
| 63 | PK | 1020 | Ignition 0 Voltage |
| 64-65 | - | - | Not Used |
| 66 | D-BU | 6105 | High Speed GMLAN Serial Data Bus High |
| 67-68 | - | - | Not Used |
| 69 | BK/WH | 451 | Ground |
| 70 | - | - | Not Used |
| 71 | BN | 323 | Actuator Supply Voltage 2 (HSD2) |
| 72 | - | - | Not Used |
| 73 | BK/WH | 771 | Transmission Range Switch Signal A |
| 74 | D-BU | 1530 | Mod Main Pressure Control Solenoid Low |
| 75-76 | - | - | Not Used |
| 77 | L-GN/BK | 2529 | Fluid Pressure Switch Signal 4 |
| 78 | BN | 418 | Torque Converter Clutch Pressure Control Solenoid (TCC PCS) Low |
| 79 | D-BU | 1225 | Fluid Pressure Switch Signal 2 |
| 80 | OG | 1983 | Transmission Turbine Speed Switch Signal |
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.