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 1544 (POWER SEAT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL DATA LIST
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Scan Tool Data List
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Scan Tool Data List
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
Driver Seat Module (DSM) Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Power Seat Parameters: Ignition Off Heated Seat Parameters: Engine Running |
|||
| Battery Voltage | Inputs/Outputs | Volts | Varies |
| Ign. Since Current DTC | Inputs/Outputs | Cycles | Varies |
| Seat Heat Zone | Inputs/Outputs | Off/Back Only/Back and Cushion | Off |
| Seat Temp Setting | Inputs/Outputs | Off/Low/Med/High | Off |
| Recline Switch | Inputs/Outputs | Forward/Back/Inactive | Inactive |
| Recliner Motor | Inputs/Outputs | Forward/Back/Inactive | Inactive |
| Horizontal Position Switch | Inputs/Outputs | Forward/Back/Inactive | Inactive |
| Horizontal Motor | Inputs/Outputs | Forward/Back/Inactive | Inactive |
| Rear Vertical Position Switch | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Rear Vertical Motor | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Front Vertical Position Switch | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Front Vertical Motor | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Lumbar/Bolster Switch | Inputs/Outputs | Forward/Rearward/Downward/Upward/Idle | Idle |
| Horizontal Lumbar Motor | Inputs/Outputs | Forward/Back/Inactive | Inactive |
| Vertical Lumbar Motor | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Seat Heat Sensor Value | Sensor Data | 0-5 Volts | Varies |
| Seat Horizontal Position | Sensor Data | 0-5 Volts | Varies |
| Front Vertical Position | Sensor Data | 0-5 Volts | Varies |
| Rear Vertical Position | Sensor Data | 0-5 Volts | Varies |
| Recline Position | Sensor Data | 0-5 Volts | Varies |
| Horizontal Lumbar Position | Sensor Data | 0-5 Volts | Varies |
| Vertical Lumbar Position | Sensor Data | 0-5 Volts | Varies |
| Last Memory Recall | Memory Data | Memory 1 or 2 | Last memory pressed |
| Last Memory Set | Memory Data | Invalid/Memory 1 or 2 | Memory 1 or 2 |
| Exit Recline Value | Memory Data | 0-5 Volts | Varies |
| Exit Rear Vertical Value | Memory Data | 0-5 Volts | Varies |
| Exit Front Vertical Value | Memory Data | 0-5 Volts | Varies |
| Exit Horizontal Value | Memory Data | 0-5 Volts | Varies |
| Exit Horizontal Lumbar Value | Memory Data | 0-5 Volts | Varies |
| Exit Vertical Lumbar Value | Memory Data | 0-5 Volts | Varies |
| Memory 1 Recline Value | Memory Data | 0-5 Volts | Varies |
| Memory 2 Recline Value | Memory Data | 0-5 Volts | Varies |
| Memory 1 Horizontal Lumbar Value | Memory Data | 0-5 Volts | Varies |
| Memory 2 Horizontal Lumbar Value | Memory Data | 0-5 Volts | Varies |
| Memory 1 Vertical Lumbar Value | Memory Data | 0-5 Volts | Varies |
| Memory 2 Vertical Lumbar Value | Memory Data | 0-5 Volts | Varies |
| Memory 1 Horizontal Value | Memory Data | 0-5 Volts | Varies |
| Memory 2 Horizontal Value | Memory Data | 0-5 Volts | Varies |
| Memory 1 Rear Vertical Value | Memory Data | 0-5 Volts | Varies |
| Memory 2 Rear Vertical Value | Memory Data | 0-5 Volts | Varies |
| Memory 1 Front Vertical Value | Memory Data | 0-5 Volts | Varies |
| Memory 2 Front Vertical Value | Memory Data | 0-5 Volts | Varies |
| Julian Date of Build | Module Information 1 | Numeric | Varies |
| 8 Digit GM Part Number | Module Information 1 | Numeric | Varies |
| Year Module Built | Module Information 1 | Numeric | Varies |
| Manufacture Enable Counter | Module Information 2 | 0-255 | 0 |
| Software Revision Number | Module Information 2 | Two Letters | Varies |
| Software Part Number | Module Information 2 | Numeric | Varies |
Passenger Seat Module (PSM) Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Power Seat Parameters: Ignition Off Heated Seat Parameters: Engine Running |
|||
| Battery Voltage | Inputs/Outputs | Volts | Varies |
| Ign. Since Current DTC | Inputs/Outputs | Cycles | Varies |
| Seat Heat Zone | Inputs/Outputs | Off/Back Only/Back and Cushion | Off |
| Seat Temp Setting | Inputs/Outputs | Off/Low/Med/High | Off |
| Recline Switch | Inputs/Outputs | Forward/Back/Inactive | Inactive |
| Recliner Motor | Inputs/Outputs | Forward/Back/Inactive | Inactive |
| Horizontal Position Switch | Inputs/Outputs | Forward/Back/Inactive | Inactive |
| Horizontal Motor | Inputs/Outputs | Forward/Back/Inactive | Inactive |
| Rear Vertical Position Switch | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Rear Vertical Motor | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Front Vertical Position Switch | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Front Vertical Motor | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Lumbar/Bolster Switch | Inputs/Outputs | Forward/Rearward/Downward/Upward/Idle | Idle |
| Horizontal Lumbar Motor | Inputs/Outputs | Forward/Backward/Inactive | Inactive |
| Vertical Lumbar Motor | Inputs/Outputs | Up/Down/Inactive | Inactive |
| Seat Heat Sensor Value | Sensor Data | 0-5 Volts | Varies |
| Julian Date of Build | Module Information 1 | Numeric | Varies |
| 8 Digit GM Part Number | Module Information 1 | Numeric | Varies |
| Year Module Built | Module Information 1 | Numeric | Varies |
| Manufacture Enable Counter | Module Information 2 | 0-255 | 0 |
| Software Revision Number | Module Information 2 | Two Letters | Varies |
| Software Part Number | Module Information 2 | Numeric | Varies |
Driver Door Module (DDM) Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Power Seat Parameters: Ignition Off Heated Seat Parameters: Engine Running |
|||
| Heated Seat Switch | Inputs | Active/Inactive | Inactive |
| Heat Indicator Low | Inputs | Off/On | Off |
| Heat Indicator Medium | Inputs | Off/On | Off |
| Heat Indicator High | Inputs | Off/On | Off |
| Back Only Heat Indicator | Inputs | Off/On | Off |
| Back Only Heat Switch | Inputs | Active/Inactive | Inactive |
| Memory Switch | Inputs | Memory 1/Memory 2/Idle | Idle |
Passenger Door Module (PDM) Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Engine Running | |||
| Heated Seat Switch | Inputs | Active/Inactive | Inactive |
| Heat Indicator Low | Inputs | Off/On | Off |
| Heat Indicator Medium | Inputs | Off/On | Off |
| Heat Indicator High | Inputs | Off/On | Off |
| Back Only Heat Indicator | Inputs | Off/On | Off |
| Back Only Heat Switch | Inputs | Active/Inactive | Inactive |
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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.