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 MANUALSCHEVROLET2006CHEVY EXPRESS G2500, VAN CARGO, 6.6 2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 358 (LIGHTING SYSTEMS)DIAGNOSTIC INFORMATION AND PROCEDURESHEADLIGHT LEVELING INOPERATIVE
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Headlight Leveling Inoperative
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Headlight Leveling Inoperative
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Headlight Leveling Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlight Leveling Schematics Connector End View Reference: Lighting Systems Connector End Views or Body Control System Connector End Views in Body Control System. |
|||
| 1 | Did you perform the Lighting Systems Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 |
|
Go to Testing for Electrical Intermittents in Wiring Systems | Go to Step 3 |
| 3 | Is a specific switch position inoperative while the others operate correctly? | Go to Step 11 | Go to Step 4 |
| 4 | Are both headlamp leveling motors inoperative? | Go to Step 5 | Go to Step 8 |
| 5 | Test the ignition 1 voltage circuit of the switch and motors for high resistance, an open or a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 6 |
| 6 | Test the ground circuit of the switch for high resistance or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 7 |
| 7 | Test the headlamp leveling motor supply voltage circuit of the switch for high resistance, an open or a short to ground. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 11 |
| 8 | Test the ignition 1 voltage circuit of the motor for high resistance or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 9 |
| 9 | Test the ground circuit of the motor for high resistance or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 10 |
| 10 | Test the headlamp leveling motor supply voltage circuit of the motor for high resistance or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 12 |
| 11 | Inspect for poor connections at the headlamp leveling switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 13 |
| 12 | Inspect for poor connections at the headlamp leveling motor. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 15 | Go to Step 14 |
| 13 | Replace the headlamp leveling switch. Refer to Headlamp Leveling Switch Replacement . Did you complete the replacement? |
Go to Step 15 | - |
| 14 | Replace the headlamp leveling motor. Did you complete the replacement? |
Go to Step 15 | - |
| 15 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 3 |
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.