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Pete
Pete, Auto Service Technician
Category: Chevy
Satisfied Customers: 24729
Experience:  14 years GM dealer Technician.
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Headlights went out security light came on, new bulbs. fuses

Customer Question

headlights went out security light came on
JA: Have you checked the fuses? Have you checked the bulbs?
Customer: new bulbs. fuses all good
JA: What is the model/year of your Chevy?
Customer: 2002 chevy avalalanche
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: yes, checked for power at the relay. batt voltage at relay. checked voltage at plug for headlight bulb maybe a half a volt
Submitted: 4 months ago.
Category: Chevy
Expert:  Pete replied 4 months ago.

Hi my name is ***** ***** I will be happy to assist with this today.

This may be a fault internally with the BCM (body control module).This can be a common component to fail.If you havent had the fault codes checked this should be done and any codes set will help diagnose this issue.This needs done with a fully compatible scan tool.I suspect the BCM at fault needing replaced.

Let me know if you need anything else and feel free to rate my help here.

Thanks Pete