Your Silverado has a separate fuse for the trailer taillights. It is located in the underhood fuse box on the drivers side. It is labeled "TRL PRK" and is 15 amp.
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2016 Keystone Laredo 5th wheel, 297SRE Andersen Ultimate
2002 Silverado Crew Cab, Duramax, Allison, 4x4
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