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.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSCHEVROLET2001SUBURBAN C1500REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 52 (AUTOMATIC TRANSMISSION - ALLISON - COMPONENT LOCATOR)COMPONENT LOCATORAUTOMATIC TRANSMISSION RELATED CONNECTOR END VIEWSTRANSMISSION CONTROL MODULE C2
2001 Chevrolet Suburban C1500
Transmission Control Module C2
2001 Chevrolet Suburban C1500SECTION Transmission Control Module C2
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.
Transmission Control Module C2
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| 1 | PNK | 1224 | Fluid Pressure Switch Signal C |
| 2 | DK BLU | 1225 | Fluid Pressure Switch Signal D |
| 3 | RED | 1226 | Fluid Pressure Switch Signal E |
| 4 | LT GRN/BLK | 2529 | Fluid Pressure Switch Reverse Signal |
| 5 | BLK/WHT | 771 | Transmission Range Switch Signal A |
| 6 | YEL | 772 | Transmission Range Switch Signal B |
| 7 | GRY | 773 | Transmission Range Switch Signal C |
| 8 | WHT | 776 | Transmission Range Switch Signal P |
| 9 | - | - | Not Used |
| 10 | YEL/BLK | 1227 | TFT Sensor Signal |
| 11-12 | - | - | Not Used |
| 13 | ORN | 1983 | Transmission Turbine Speed Switch Signal |
| 14 | LT BLU | 1984 | Transmission Turbine Speed Switch Low Reference |
| 15 | PPL/WHT | 821 | Vehicle Speed Signal HI |
| 16 | LT GRN/BLK | 822 | Vehicle Speed Signal LO |
| 17 | RED/BLK | 1230 | AT ISS Signal High |
| 18 | DK BLU/WHT |
1231 | AT ISS Signal Low |
| 19 | - | - | Not Used |
| 20 | BLK | 2762 | Low Reference |
| 21 | PPL | 2471 | Trans ID |
| 22 | LT BLU/WHT | 1229 | PPC Solenoid A Valve High Control |
| 23 | RED/BLK | 1228 | PPC Solenoid A Valve Low Control |
| 24 | PNK/BLK | 2468 | PPC Solenoid B Valve High Control |
| 25 | BRN/WHT | 2469 | PPC Solenoid B Valve Low Control |
| 26 | LT GRN | 1222 | Shift Solenoid C Valve Control |
| 27 | YEL/BLK | 1223 | Shift Solenoid D Valve Control |
| 28 | ORN/WHT | 2527 | Shift Solenoid E Valve Control |
| 29 | BRN | 418 | TCC PWM Solenoid Valve Control |
| 30 | - | - | Not Used |
| 31 | BRN | 323 | 12 Volt Reference |
| 32 | DK GRN/WHT |
2528 | TCC PWM Solenoid Supply Voltage |
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.