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The WESTERN 29400-7 Plug-In Harness Kit is a genuine OEM truck-side wiring harness designed for 2007 (New Body) through 2015 Chevrolet Silverado and GMC Sierra trucks equipped with HB3 (9005) high beam and H11 low beam headlights. Designed for use with WESTERN 3-Port Isolation Module systems, this complete harness kit allows your truck headlights to seamlessly transfer operation to your plow headlights whenever the plow is connected
Western 29400-7 will fit 2007(new body)-2015 GM Trucks with HB3 & H11 headlights.
Please refer to Western Quick Match to confirm fitment.
If you don't already have it, you will need a module: 29070-1 Isolation Module
If you need installation instructions. you can find it here

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Email Returns@plowparts.com to request a Return Merchandise Authorization (RMA) number. All returns must be approved by PlowParts.com. We do not accept returns without an RMA number.
All returns must be made within 30 days of purchase. Customers are responsible for return shipping fees. All stock items are subject to a 20% restocking fee or a minimum fee of $35.00, whichever is greater.
Unauthorized returns may be refused or returned at the customer’s expense.
All electrical items and special-order items are non-returnable. This includes isolation modules, spreader control modules, and plow/spreader controllers.