Today in our 2015 Chevrolet Silverado 2500, we're going to be taking a look at installing the Putco pure high performance H11 halogen bulb in nitro blue, part number P230011NB. As you can see on the right, we have our Putco blue light installed. On the left is our factory bulb. Here you see our new Putco blue lights installed. They're going to replace your factory headlight bulbs and add that… see more >