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Wiring Harness

djehle

By djehle
in Ask A GM Technician

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djehle New Member

djehle

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I have a 2005 Sierra 2500HD with ext. cab and plow package. There is a factory installed switch on the dash for the roof light. I have installed a light bar, and was told that the switched wire could be found in the panel behind the left rear door. I can not find it there, or up with the dome light. Where can I find the switched wire to connect to?

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