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My 2003 chevy tarhoe will not start it shows unknown driver…

Customer Question
My 2003 chevy tarhoe...

My 2003 chevy tarhoe will not start it shows unknown driver on dash panel and security symbol does not stay on and door locks and key in ign chime does not work or interior lights

Mechanic's Assistant: Have you checked the fuses? The dashboard bulbs?

Yes

Mechanic's Assistant: What is the model of your '03 GM?

Tahoe

Mechanic's Assistant: Are you fixing your Tahoe yourself? What have you tried so far?

Yes replaced ignition switch and replaced five year old battery

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Power windows do not work and key fob does not work

Submitted: 10 months ago.Category: GM
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Answered in 20 minutes by:
9/30/2017
GM Mechanic: Jerry Newton, GMC Technician replied 10 months ago
Jerry Newton
Jerry Newton, GMC Technician
Category: GM
Satisfied Customers: 5,694
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
Verified

This sounds like a problem with the body control module, it controls many of these functions, if not all of them at least indirectly. If the body control module is disturbing the class 2 data bus, it can cause all computers to stop working, and that would affect your windows and things like that.

If this were in my shop, I would have a scan tool on it to see what the BCM is doing. Do you have a scan tool that will read BCM data?

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Customer reply replied 10 months ago
Thank you for your help sir have a great weekend!
GM Mechanic: Jerry Newton, GMC Technician replied 10 months ago

You're welcome, good luck with it!

Please take a moment to rate my answers, that's how I get compensated. If you have more questions, I am happy to follow up with you.

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Customer reply replied 10 months ago
I only have a tool that reads trouble codes.
GM Mechanic: Jerry Newton, GMC Technician replied 10 months ago

You should consider having a pro look at this with his scan tool. This is a computer issue, not a very DIY friendly repair.

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Customer reply replied 10 months ago
Alright thank you sir
GM Mechanic: Jerry Newton, GMC Technician replied 10 months ago

You are welcome. Enjoy your weekend!

Please take a moment to rate my answers, that's how I get compensated. If you have more questions, I am happy to follow up with you.

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