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I am working on a 2005 chevy uplander. When I turn the

Customer Question
Hi, I am working on...
Hi, I am working on a 2005 chevy uplander.
When I turn the idnition swith the car don't crank and the dashboard don't light up, also my matco tools scaner don't connect to the pcm and I can't ger a reading
Submitted: 7 months ago.Category: Chevy
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Answered in 8 minutes by:
12/29/2017
Chevy Mechanic: Jaybird61, ASE Certified Master Technician replied 7 months ago
Jaybird61
Jaybird61, ASE Certified Master Technician
Category: Chevy
Satisfied Customers: 2,319
Experience: Automotive Instructor at Palm Beach State College
Verified

Hi, My name is Jay

Do you have power to anything like headlights? Have you verified the fuses are getting power in main fuse box?

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Customer reply replied 7 months ago
when turn the ignition switch the relays work but panel is dead except for the check engine light. He was driving and the radio and the panel stop working, but still driving good, he stop at the girlfriend house aand turn of the vehicle and after that the car never start again. My scanner can connect to the vehicle at all...
Customer reply replied 7 months ago
I connect my sanner manually and only shows radio, navegation radio and uplevel radio...
Chevy Mechanic: Jaybird61, ASE Certified Master Technician replied 7 months ago

These vehicles have may electrical issues with electrical connections getting fretting corrosion in connections of different modules. Sometimes just disconnecting affected modules and putting a small amount of dielectric grease on connector pins will fix issue. Here is tech bulletin for problem and fix.

https://www.dropbox.com/s/n0v9hqfzuhfjxoi/2005%20chev%20uplander%20fretting%20corosion.pdf?dl=0

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Customer reply replied 7 months ago
I remove the crank relay and by using a cable I crank the car but don't stay on, just 4 seconds and shut off
Chevy Mechanic: Jaybird61, ASE Certified Master Technician replied 7 months ago

The computer is not keeping the fuel pump engaged. I suggest following the tech bulletin and disconnect each module as directed and apply dielectric to pins and reconnecting them. Have battery disconnected during disconnection of any module.

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Chevy Mechanic: Jaybird61, ASE Certified Master Technician replied 7 months ago

If you have no other questions then please enter a 5 star rating so I can get credit for assisting you today. Thanks.

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Customer reply replied 7 months ago
Your help was ambiguous and slow that day, I work mobil and looking for links and downloads that day weren't an option.Thanks...
Chevy Mechanic: Jaybird61, ASE Certified Master Technician replied 7 months ago

Your welcome. We do the best we can and respond as fast as the system lets us. Sometimes there is a delay from when you reply and I respond and hope your problem was corrected with my help. Have a great new year.

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