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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 919 (LIGHTING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL DATA LIST
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M
Scan Tool Data List
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Scan Tool Data List
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2001 GMC Yukon XL, 2001 GMC Yukon, 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, and 2001 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Scan Tool Data List
| Scan Tool Parameter | Data List | Units Displayed | Typical Data Value |
|---|---|---|---|
| Ignition ON/Engine OFF/Vehicle in PARK/Headlamps in AUTO | |||
| Julian Date | Module Information 1 | Numeric | Varies |
| Manufacture Enable Counter | Module Information 1 | 0-255 | 0 |
| Module Part Number | Module Information 1 | Numeric | Varies |
| Software Design Suffix | Module Information 1 | Two Letters | Varies |
| Software Part Number | Module Information 1 | Numeric | Varies |
| Lighting Calibration Number | Module Information 2 | Numeric | Varies |
| Lighting Suffix | Module Information 2 | Two Letters | Varies |
| Reminder Calibration Number | Module Information 2 | Numeric | Varies |
| Reminder Suffix | Module Information 2 | Two Letters | Varies |
| RAP Calibration Number | Module Information 2 | Numeric | Varies |
| RAP Suffix | Module Information 2 | Two Letters | Varies |
| Ambient Light | Data | DARK/LIGHT | LIGHT (DRL ON) DARK (AHL ON) |
| Ambient Light Sensor | Data | Volts | 4.7 Volts Maximum Light to 1.0 Volt Maximum Dark |
| Battery Voltage | Data | Volts | Varies |
| Courtesy Lamp Timer | Data | Seconds | 0 Seconds |
| Dimming Potentiometer | Data | Volts | Varies |
| High Beam Input | Data | Volts | 12.2 - Low Beams 0.8 - High Beams |
| Inadvertent Power Timer | Data | Seconds | 2400 Seconds |
| RAP Timer | Data | Seconds | 1198 Seconds |
| Cargo Lamp Switch | Input 1 | ON/OFF | OFF |
| Driver Door Jamb Sw. | Input 1 | ACTIVE/INACTIVE | ACTIVE (door open) |
| Ignition 1 | Input 1 | ACTIVE/INACTIVE | ACTIVE |
| Ignition 3 | Input 1 | ACTIVE/INACTIVE | ACTIVE |
| Ignition Power Mode | Input 1 | OFF/RUN/CRANK/ UNKNOWN | RUN |
| Last RFA Cmd. Since Wake-Up | Input 1 | None/Lock/Unlock/Panic/Manual Resynch/Fob Program/Diag Acknowledge/Diag Request | Unlock |
| Park Brake Switch | Input 1 | SET/RELEASED | RELEASED (park brake not set) |
| Pass Door Unlock Input | Input 1 | ACTIVE/INACTIVE | INACTIVE |
| RFA Message Since Wake-Up | Input 1 | NONE/PANIC/Active Unlock Fob# /Active Lock/Prog Mode Cancel/Prog Successful/Prog Mode Ack/Manual Resync | Actv Unlock Fob# |
| RAP Relay Feedback | Input 1 | ON/OFF | ON |
| Cargo Lamp Switch | Input 2 | ON/OFF | OFF |
| Courtesy Lamp Relay | Input 2 | ON/OFF | OFF |
| Dim Pot Input | Input 2 | ACTIVE/INACTIVE | ACTIVE |
| Dome Lamp Switch | Input 2 | ON/OFF | OFF |
| Dome Override Switch | Input 2 | ON/OFF | OFF |
| Flash to Pass Switch | Input 2 | ON/OFF | OFF |
| Front Fog Lamp Switch | Input 2 | ON/OFF | OFF |
| Headlamp Relay Feedback | Input 2 | ON/OFF | OFF (in LIGHT state) |
| High Beam Switch | Input 2 | ON/OFF | OFF |
| Left Turn Signal | Input 2 | ON/OFF | OFF |
| Park Lamps | Input 2 | ON/OFF | ON |
| Right Turn Signal | Input 2 | ON/OFF | OFF |
| Chime | Outputs | None/Headlamp/Turn Signal/Key In Ignition/Seatbelt/Park Brake | None |
| Courtesy Lamp Relay | Outputs | ON/OFF | OFF |
| DRL Relay | Outputs | ON/OFF | ON (in LIGHT state) |
| Dimming | Outputs | ACTIVE/INACTIVE | INACTIVE (park lamps OFF) |
| Front Fog Lamp Relay | Outputs | ON/OFF | OFF |
| Headlamp Power Relay | Outputs | ON/OFF | OFF (in LIGHT state) |
| Inadvertent Power Relay | Outputs | ON/OFF | ON |
| Interior Lighting Mode | Outputs | None/Interior/Illuminated Entry/Exit Lighting/Remote Illuminated | Interior |
| Park Lamp Relay | Outputs | ON/OFF | OFF (in LIGHT state) |
| Passenger Door Unlock Relay | Outputs | ON/OFF | OFF |
| Rear Fog Lamp Relay | Outputs | ON/OFF | OFF |
| RAP Relay | Outputs | ON/OFF | ON |
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.