The Denali headlights have a pigtail connector that adapts your stock harness to the 9005 bulbs. They just plug in and work I have them on my truck. As for changing them to HIDs I would just get the correct bulb and sell your 9006 HIDs. BTW you will love the Denali OEM projectors, big upgrade over stock!
Last edited by GMCwantsLS1; 01-25-2010 at 07:44 PM.
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning