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 MANUALSCHEVROLET2009TAHOE BASE, 4.8 CREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 56 (POWER SEAT SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL DATA LIST
2009 Chevrolet Tahoe Base, 4.8 C
Scan Tool Data List
2009 Chevrolet Tahoe Base, 4.8 CSECTION Scan Tool Data List
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Driver Position Module
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition ON/Engine OFF | |||
| Battery Voltage Signal | Inputs | Volts | Varies |
| Current | Inputs | amps | Varies |
| Driver Seat Front Vertical Sensor | Seat 1 Info | Volts | 0-5 Volts |
| Driver Seat Horizontal Sensor | Seat 1 Info | Volts | 0-5 Volts |
| Driver Seat Rear Vertical Sensor | Seat 1 Info | Volts | 0-5 Volts |
| Driver Seat Recline Sensor | Seat 1 Info | Volts | 0-5 Volts |
| Front Vertical Downward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Front Vertical Upward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Front Vertical Motor Downward | Seat 1 Outputs | Active/Inactive | Inactive |
| Front Vertical Motor Upward | Seat 1 Outputs | Active/Inactive | Inactive |
| Horizontal Motor Forward | Seat 1 Outputs | Active/Inactive | Inactive |
| Horizontal Motor Rearward | Seat 1 Outputs | Active/Inactive | Inactive |
| Horizontal Forward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Horizontal Rearward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Lumbar Downward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Lumbar Forward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Lumbar Horizontal Position | Memory Data 1 | Volts | 0-5 Volts |
| Lumbar Horizontal Position | Memory Data 2 | Volts | 0-5 Volts |
| Lumbar Horizontal Sensor | Seat 1 Info | Volts | 0-5 Volts |
| Lumbar Motor Downward | Seat 1 Outputs | Active/Inactive | Inactive |
| Lumbar Motor Forward | Seat 1 Outputs | Active/Inactive | Inactive |
| Lumbar Motor Rearward | Seat 1 Outputs | Active/Inactive | Inactive |
| Lumbar Motor Upward | Seat 1 Outputs | Active/Inactive | Inactive |
| Lumbar Rearward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Lumbar Upward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Lumbar Vertical Position | Memory Data 1 | Volts | 0-5 Volts |
| Lumbar Vertical Position | Memory Data 2 | Volts | 0-5 Volts |
| Lumbar Vertical Sensor | Seat 1 Info | Volts | 0-5 Volts |
| Recline Forward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Recline Motor Forward | Seat 1 Outputs | Active/Inactive | Inactive |
| Recline Motor Rearward | Seat 1 Outputs | Active/Inactive | Inactive |
| Recline Rearward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Rear Vertical Downward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Rear Vertical Motor Downward | Seat 1 Outputs | Active/Inactive | Inactive |
| Rear Vertical Motor Upward | Seat 1 Outputs | Active/Inactive | Inactive |
| Rear Vertical Upward Switch | Seat 1 Inputs | Active/Inactive | Inactive |
| Seat Horizontal Position | Memory Data 1 | Volts | 0-5 Volts |
| Seat Horizontal Position | Memory Data 2 | Volts | 0-5 Volts |
| Seat Front Vertical Position | Memory Data 1 | Volts | 0-5 Volts |
| Seat Front Vertical Position | Memory Data 2 | Volts | 0-5 Volts |
| Seat Rear Vertical Position | Memory Data 1 | Volts | 0-5 Volts |
| Seat Rear Vertical Position | Memory Data 2 | Volts | 0-5 Volts |
| Seat Recline Position | Memory Data 1 | Volts | 0-5 Volts |
| Seat Recline Position | Memory Data 2 | Volts | 0-5 Volts |
Door Module(s)
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
| Ignition ON/Engine OFF | |||
| Battery Voltage Signal | Data | Volts | Varies |
| Memory Recall Switch | Inputs | Inactive/Memory 1/Memory 2/Exit | Inactive |
| Seat Back Heat Mode Ind. Cmd. | Outputs | OFF/ON | OFF |
| Seat Back Heat Mode Sw. | Inputs | Inactive/Active | Inactive |
| Seat Cool Mode Ind. Cmd | Outputs | OFF/ON | OFF |
| Seat Cool Mode Switch | Inputs | Inactive/Active | Inactive |
| Seat Heat High Ind. Cmd. | Outputs | OFF/ON | OFF |
| Seat Heat Low Ind. Cmd. | Outputs | OFF/ON | OFF |
| Seat Heat Medium Ind. Cmd. | Outputs | OFF/ON | OFF |
| Seat Heat Mode Cmd. | Outputs | OFF/ON | OFF |
| Seat Heat Mode Sw. | Inputs | Inactive/Active | Inactive |
Rear Heated Seat Module
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
| Ignition ON/Engine OFF | |||
| Battery Voltage Signal | Data | Volts | Varies |
| Seat Back Heat Mode Ind. Cmd. | Outputs | OFF/ON | OFF |
| Seat Back Heat Mode Sw. | Inputs | Inactive/Active | Inactive |
| Seat Cool Mode Ind. Cmd | Outputs | OFF/ON | OFF |
| Seat Cool Mode Switch | Inputs | Inactive/Active | Inactive |
| Seat Heat High Ind. Cmd. | Outputs | OFF/ON | OFF |
| Seat Heat Low Ind. Cmd. | Outputs | OFF/ON | OFF |
| Seat Heat Medium Ind. Cmd. | Outputs | OFF/ON | OFF |
| Seat Heat Mode Cmd. | Outputs | OFF/ON | OFF |
| Seat Heat Mode Sw. | Inputs | Inactive/Active | Inactive |
RENDER: 1.0x
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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.