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 MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 798 (LIGHTING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL DATA LIST
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Scan Tool Data List
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Scan Tool Data List
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Exterior Lamps
| Scan Tool Parameter | Units Displayed | Typical Data Value |
|---|---|---|
| Ignition On, Engine Off | ||
| Battery 1 | Volts | Battery Voltage |
| DRL Relay Command | On/Off | On when requested |
| DRL Relay Feedback | High/Low | Low when requested |
| Fog Lamp Relay Cmd. | On/Off | On when requested |
| Fog Lamp Relay Fdbk. | High/Low | Low when requested |
| Fog Lamps Switch | On/Off | On when requested |
| High Beam Switch | On/Off | On when requested |
| Low Beam Input | Volts | 0.4 volts - Battery Voltage |
| Low Beam Input = Off | Yes/No | No when Low Beams requested |
| Low Beam Input = DRL | Yes/No | Yes when DRL requested |
| Low Beam Input = High | Yes/No | No when Low Beams requested |
| Park Lamp Switch | On/Off | On when Park Lamps requested |
Interior Lamps
| Scan Tool Parameter | Units Displayed | Typical Data Value |
|---|---|---|
| Ignition On, Engine Off | ||
| Dome Lamp Command | On/Off | On when Dome requested |
| Dome Lamp Feedback | High/Low | Low when Dome requested |
| Driver Door Switch | High/Low | Low with Driver Door Open |
| Inadvertent Power Cmd. | On/Off | On |
| Inadvertent Power Fdbk. | High/Low | Low |
| I/P Dimmer Input | Volts | 0.5-4 volts |
| I/P Dimmer Output | % | 20-100% |
| Key In Ignition | Yes/No | Yes |
| Pass Door Switches | High/Low | Low with any Door Open |
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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.