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Looking For 7-Way Harness For 2002 GMC Sierra  

Updated 10/27/2025 | Published 03/15/2025

Question:

Have 2002 GMC Sierra need harness for 7 way plug into factory block the rear truck frame. Did not see anything on your website

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Expert Reply:

Hello Mark, thanks for reaching out. We do have wiring options for the 2002 GMC Sierra. What we have is designed to replace the factory 7-way and will plug in to the standard USCAR connector (pictured below). As long as this is what you have, you can use the 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket # HM40975.

expert reply by:
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Jesse M
USCAR Connector
USCAR Connector
(click to enlarge)
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Jesse M.

10/27/2025

Hey Mark, how did the 7- and 4-way connector work out on your Sierra? Knowing if it plugged into your factory block cleanly could help others sorting through the same wiring setup. Your update could make it easier for the next person with this truck.

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