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 945 (IMMOBILIZER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESSECURITY INDICATOR ALWAYS ON OR FLASHING
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2
Security Indicator Always On or Flashing
2006 Chevrolet Chevy Express G2500, Van Cargo, 6.6 2SECTION Security Indicator Always On or Flashing
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2007 GMC Savana Special, 2007 GMC Savana Camper Special, 2007 GMC Savana, 2007 Chevrolet RV Cutaway, and 2007 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Security Indicator Always On or Flashing
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Immobilizer Schematics Connector End View Reference: Immobilizer Connector End Views |
|||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 | Replace the body control module (BCM). Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Diagnostic System Check - Vehicle | - |
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.