2001 Nissan Frontier Hitch Wiring | Harnesses, Adapters Nissan Frontier 2001, Professional™ Inline to Trailer Wiring Harness Connector by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. 2001 Nissan Frontier Trailer Wiring Harness | Advance Auto 2001 Nissan Frontier Trailer Wiring Harness Your 2001 Nissan Frontier might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Trailer Wiring Harness product you desperately need.