So my friends its been a while since I posted, I found some good info which I researched for a Silverado Work truck If any of you are looking to upgrade to fog lamp this is your thread to save money!!!!! Starting with what you need for an upgrade: Fog lamp - Bumper Cover Wire Harness - Part # 25866139 (Gmpartsdirect - $61.00) In-Dash Switch- Part # 25858709 or D1531J (Gmpartsdirect - 33.47) In my case I already had Bumper covers and the fog lamps All i needed was Wire Harness and In0dash Switch. I paid $90.00 for an after market fog lamp and bumper cover. So the overall cost to upgrade to fog lamps for my work truck was $209.50 including shipping from GMpartsdirect PS: Most Work Truck do not come with power window or power lock unless you buy one with those options, but they can be upgraded the key is getting the right Wire harness that allows to connect the keyless entry. The wire harness mentioned above has that option that . So my frineds if you wanna upgrade you truck to keyless entry you just opened a door of possibility! see the picture below for part # 3: http://parts.nalleygmc.com/images/parts/gm/fullsize/061110TC02-967.JPG Do let me know if you guys have question..