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 MANUALSCHEVROLET2012CHEVY EXPRESS G2500, VAN PASSENGER, 4.8L ENG VIN AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2335 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - Q1B TO X88)COMPONENT CONNECTOR END VIEWSS34 HVAC CONTROLS SWITCH ASSEMBLY X2
2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN A
S34 HVAC Controls Switch Assembly X2
2012 Chevrolet Chevy Express G2500, Van Passenger, 4.8L Eng VIN ASECTION S34 HVAC Controls Switch Assembly X2
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 GMC Savana, 2013 GMC RV Cutaway, 2013 GMC Cutaway, 2013 Chevrolet RV Cutaway, and 2013 Chevrolet Express. However, it is still accessible from the selected car via links, so may be relevant.
Connector Part Information
|
Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool | Service Terminal | Tray | Core Crimp | Insulation Crimp |
|---|---|---|---|---|---|---|---|
| I | Pending | J-35616-4A (PU) | J-38125-11A | 12066214 | 2 | Pins: A-D, F- Not Available | Pins: A-D, F- Not Available |
| II | Pending | J-35616-4A (PU) | J-38125-11A | 12034046 | 2 | E | A |
S34 HVAC Controls Switch Assembly X2
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| A | 0.8 | YE | 60 | Blower Motor Low Control | I | - |
| B | 0.8 | TN | 63 | Blower Motor Medium Control | I | - |
| C | 0.8 | L-BU | 72 | Medium 2 Blower Motor Control | I | - |
| D | 0.8 | OG | 52 | Blower Motor High Control | I | - |
| E | 1 | BN | 141 | Ignition Voltage | I | - |
| F | 0.8 | L-BU | 733 | Air Temperature Door Control | I | - |
| G | 1 | WH | 119 | Blower Motor Switch Control | I | - |
| H | 0.5 | D-GN/WH | 762 | A/C Request Signal | - | C60 |
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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.