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 G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 67 (SUSPENSION CONTROL SYSTEM - SUSPENSION LEVELING)DIAGNOSTIC INFORMATION AND PROCEDURESSCAN TOOL DATA DEFINITIONS

2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Scan Tool Data Definitions

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Scan Tool Data Definitions

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Compressor Relay Command: Indicates when the compressor relay is activated.
Controller Battery Volts: Range 10.0-16.0 V. This data refers to the battery system voltage as measured by the suspension control module.
Exhaust Valve Command: Indicates when the exhaust valve is active.
Left Rear Position Sensor: Range 0.5-4.85 V. This data refers to vehicle height measured in volts.
Rear Leveling Air Press: Indicates the system pressure in psi.
Rear Leveling Air Press: Indicates the system pressure in volts.
Right Rear Position Sensor: Range 0.5-4.85 V. This data refers to vehicle height measured in volts.
Sensor Supply Voltage: Indicates if the 5-volt reference circuit for the suspension position sensor is active.
Vehicle speed: Indicates speed of vehicle.

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.