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 993 (LIGHTING SYSTEMS)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 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Body Control Module (BCM)
| Scan Tool Parameter | Data Display | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition in the ON position, bright light applied to the ambient light sensor, park brake not set, headlamp switch in the OFF position, dome lamp switch in the OFF position, fog lamp switch in the OFF position, and all doors closed. | |||
| Ambient Light Sensor | Exterior Lighting | Volts | Approximately 0.67 Volts |
| Ambient Light Status | Exterior Lighting | Night/ Day/ Unknown/ Invalid | Day |
| Auto Hdlp. Disable Sw. | Exterior Lighting | Inactive/Active | Inactive |
| Backup Lamps | Exterior Lighting | Off/On | Off |
| Courtesy Lamp PWM Cmd. | Interior Lighting | Percent | 0% |
| Cruise Ctrl. LED Dimming Cmd. | Interior Lighting | Percent | 2% |
| Ctsy. Lamp Actv. Reason | Interior Lighting | Off/Panic/Manual/Air Bag/Door Open/RFA/RFA Theft/Door Closed/Exit/Manual Defeat | Off |
| Dimming Control Reference | Interior Lighting | Volts | Approximately 3.0 Volts |
| Dimming Control Signal | Interior Lighting | Percent | Varies 9% - 100% |
| Dimming Control Signal | Interior Lighting | Volts | Varies 0.23 - 3.0 Volts |
| DRL Relay Command | Exterior Lighting | Off/On | Off |
| Flash to Pass Switch | Exterior Lighting | Inactive/Active | Inactive |
| Front Fog Lamp Relay Command | Exterior Lighting | Off/On | Off |
| Front Fog Lamp Switch | Exterior Lighting | Inactive/Active | Inactive |
| Hazard Lamp Switch | Exterior Lighting | Inactive/Active | Inactive |
| Headlamp Switch | Exterior Lighting | Inactive/Active | Inactive |
| High Beam Relay Command | Exterior Lighting | Off/On | Off |
| High Beam Select Switch | Exterior Lighting | Inactive/Active | Inactive |
| Incandescent Dimming PWM Cmd. | Interior Lighting | Percent | 0% |
| LED Dimming PWM Cmd. | Interior Lighting | Percent | 0% |
| Left Turn Signal Switch | Exterior Lighting | Inactive/Active | Inactive |
| LF Turn Signal | Exterior Lighting | Off/On | Off |
| LR Turn Signal | Exterior Lighting | Off/On | Off |
| Low Beam Relay Command | Exterior Lighting | Off/On | Off |
| Park Brake Switch | Inputs | Released/Applied | Released |
| Park Lamp Relay Cmd. | Exterior Lighting | Off/On | Off |
| Park Lamp Switch | Exterior Lighting | Inactive/Active | Inactive |
| Right Turn Signal Switch | Exterior Lighting | Inactive/Active | Inactive |
| RF Turn Signal | Exterior Lighting | Off/On | Off |
| RR Turn Signal | Exterior Lighting | Off/On | Off |
| Stop Lamp Sw. Status | Exterior Lighting | Counts | 1023 Counts |
| Stop Lamp Relay Command | Exterior Lighting | Off/On | Off |
Driver Door Switch
| Scan Tool Parameter | Data Display | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition in the ON position, bright light applied to the ambient light sensor, park brake not set, headlamp switch in the OFF position, dome lamp switch in the OFF position, fog lamp switch in the OFF position, and all doors closed. | |||
| Driver Door Open Sw. | Inputs | Inactive/Active | Inactive |
| Memory Switch Backlight | Outputs | Percent | 0% |
| Window Switch Backlight | Outputs | Percent | 0% |
Export Body Control Module (XBCM)
| Scan Tool Parameter | Data Display | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition in the ON position, bright light applied to the ambient light sensor, park brake not set, headlamp switch in the OFF position, dome lamp switch in the OFF position, fog lamp switch in the OFF position, all doors closed, and trailer harness disconnected. | |||
| Battery Voltage | Data Display | Volts | Varies |
| Rear Fog Lamp Relay Cmd. | Data Display | Off/On | Off |
| Rear Fog Lamp Switch | Data Display | Inactive/Active | Inactive |
| Trailer Left Bulb Out Signal | Data Display | Counts | 0 Counts |
| Trailer Right Bulb Out Signal | Data Display | Counts | 0 Counts |
| Trailer Detection Input | Data Display | Off/On | Off |
| Trailer Fog Lamp Relay Cmd. | Data Display | Off/On | Off |
Passenger Door Switch
| Scan Tool Parameter | Data Display | Units Displayed | Typical Data Value |
|---|---|---|---|
| Operating Conditions: Ignition in the ON position, bright light applied to the ambient light sensor, park brake not set, headlamp switch in the OFF position, dome lamp switch in the OFF position, fog lamp switch in the OFF position, and all doors closed. | |||
| Memory Switch Backlight | Outputs | Percent | 0% |
| Passenger Door Open Sw. | Inputs | Inactive/Active | Inactive |
| Window Switch Backlight | Outputs | Percent | 0% |
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.