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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1974 (COMPONENT CONNECTOR END VIEWS - (4 OF 5))INFLATABLE RESTRAINT SENSING AND DIAGNOSTIC MODULE (SDM) (WITH APL/ATY)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Inflatable Restraint Sensing and Diagnostic Module (SDM) (with APL/ATY)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Inflatable Restraint Sensing and Diagnostic Module (SDM) (with APL/ATY)
WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Inflatable Restraint Sensing and Diagnostic Module (SDM) (with APL/ATY)
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1 | 0.5 BK/WH | 851 | Ground |
| 2 | 0.5 D-GN | 5060 | Low Speed GMLAN Serial Data |
| 3 | - | - | Not Used |
| 4 | 0.5 PK | 3022 | Steering Wheel Module - Stage 2 - Low Control |
| 5 | 0.5 WH | 3023 | Steering Wheel Module - Stage 2 - High Control |
| 6 | 0.5 GY | 3027 | I/P Module - Stage 2 - High Control |
| 7 | 0.5 PU | 3026 | I/P Module - Stage 2 - Low Control |
| 8 | 0.5 BN | 3020 | Steering Wheel Module - Stage 1 - Low Control |
| 9 | 0.5 TN | 3021 | Steering Wheel Module - Stage 1 - High Control |
| 10 | 0.5 YE | 3025 | I/P Module - Stage 1 - High Control |
| 11 | 0.5 OG | 3024 | I/P Module - Stage 1 - Low Control |
| 12 | 0.5 YE/BK | 2138 | Side Impact Module - Left Front- Low Control |
| 13 | 0.5 BN | 2137 | Side Impact Module - Left Front - High Control |
| 14-15 | - | - | Not Used |
| 16 | 0.5 OG/BK | 2119 | Seat Belt Pretensioner - Left - Low Control (HP5) |
| 17 | 0.5 TN | 2118 | Seat Belt Pretensioner - Left - High Control (HP5) |
| 18-19 | - | - | Not Used |
| 20 | 0.5 PK | 5020 | Roof Rail Module - Left - Low Control |
| 21 | 0.5 PU/WH | 5019 | Roof Rail Module - Left - High Control |
| 22 | 0.5 YE/BK | 5021 | Roof Rail Module - Right - High Control |
| 23 | 0.5 WH/BK | 5022 | Roof Rail Module - Right - Low Control |
| 24 | 0.5 PU | 7380 | Driver Retractor Pretensioner Low Signal (HP5) |
| 25 | 0.5 PU/OG | 7379 | Driver Retractor Pretensioner High Signal (HP5) |
| 26-27 | - | - | Not Used |
| 28 | 0.35 PK | 5057 | Seat Position Sensor - Low Reference |
| 29-30 | - | - | Not Used |
| 31 | 0.35 RD/WH | 740 | Battery Positive Voltage |
| 32 | 0.35 PK | 439 | Ignition 1 Voltage |
| 33-35 | - | - | Not Used |
| 36 | 0.5 YE | 6168 | Middle Front Impact Sensing Module Supply Voltage |
| 37 | 0.5 YE/GN | 6776 | Middle Front Impact Sensing Module (2) Supply Voltage |
| 38 | 0.5 YE/BK | 6169 | Middle Front Impact Sensing Module Signal |
| 39 | 0.5 L-GN | 6777 | Middle Front Impact Sensing Module (2) Signal |
| 40 | 0.35 GY/BK | 6621 | Left Middle Side Impact Sensing Module Low Reference |
| 41 | 0.35 L-GN/WH | 6625 | Right Middle Side Impact Sensing Module Low Reference |
| 42 | 0.35 D-GN/WH | 6620 | Left Middle Side Impact Sensing Module Signal |
| 43 | 0.35 L-BU/BK | 6624 | Right Middle Side Impact Sensing Module Signal |
| 44-57 | - | - | Not Used |
| 58 | 0.5 YE/BK | 5229 | Roll Over Sensor High Signal |
| 59 | 0.35 TN/WH | 238 | Seat Belt Switch - Left - Signal |
| 60 | - | - | Not Used |
Connector Part Information
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Terminal Part Information
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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.