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Making Connections Under the Hood on a 2003 GMC Sierra for Brake Controller Installation  

Question:

I have a 2003 GMC Sierra 2500. I bought my controller and harness off of Etrailer yesterday and it installed just fine. Is there more wiring under the hood or a fuse that needs installed?

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Expert Reply:

Yes, there could be some additional connections that will need to be made under the hood of your 2003 GMC Sierra to make everything fully functional. I have included a link to our help article that explains the installation and the under the hood connections that you may need to make.

You might find that you will need to make all the connections mentioned or you may only need a fuse. No matter what all is needed on your specific truck the help article covers it.

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Michael H

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