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 MANUALSCHEVROLET2008UPLANDER V6-3.9LREPAIR AND DIAGNOSISTESTING AND INSPECTIONPROGRAMMING AND RELEARNINGAUTOMATIC LEVEL CONTROL SENSOR PROGRAMMING AND SETUP
2008 Chevrolet Uplander V6-3.9L
Automatic Level Control Sensor Programming and Setup
2008 Chevrolet Uplander V6-3.9LSECTION Automatic Level Control Sensor Programming and Setup
Automatic Level Control Sensor Programming and Setup
Position Sensor Calibration
After replacement of the automatic level control sensor, the system untested code will be displayed by a continuous flashing accessory inflator switch LED with a repetition rate of 0.25 second. The self test will need to be performed and a code 12 system OK will have to be displayed on the accessory inflator switch LED before the system can function normally. Refer to Diagnostic Trouble Code (DTC) Displaying (Diagnostic Trouble Code (DTC) Displaying) for instructions to perform ALC self test.
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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.