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2020 Sierra 1500 AT4 / 7 pin trailer connector truck side.

Garett Dixon

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Garett Dixon Enthusiast

Garett Dixon

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Hello, I recently bought a new sierra 1500 year 2020 with the technology package. My boat trailer lights are not constant. I bought a truck side 7 pin trailer tester from Curt. It demonstrates that internmentant issues on the truck side. I took the truck back twice to the GMC dealership and they say they use a gm certified $200 tester and they state the truck is fine. Any thoughts? 

Garett Dixon Enthusiast

Garett Dixon

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Hey! My boat trailer has a 5 flat. I use an adapter to the  7 pin adapter truck. Boat trailer has surge breaks. I had no issues with my ram 3500 I traded in.

 

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