Jump to content
  • Sign up for FREE! Become a GM-Trucks.com Member Today!

    In 20 seconds you can become part of the worlds largest and oldest community discussing General Motors, Chevrolet and GMC branded pickups, crossovers, and SUVs. From buying research to owner support, join 1.5 MILLION GM Truck Enthusiasts every month who use GM-Trucks.com as a daily part of their ownership experience. 

Add Fog Lights to a 2009 Sierra 2500hd WT

Recommended Posts

I have an urge to add fog lights to my truck. They weren’t standard on this model. Please someone tell me exactly what items I need to do this. The cut outs are in the bumper already. So, wiring, relay, harnesses, etc? I already swapped out the left side driver panel to put in a DIC. The new panel already had the fog light switch, so I don’t need that. I’m hoping to piece together a kit as I don’t want to shell out $400+ from the local dealer, who I can’t stand. Our salvage system here is horrible for responses, so haven’t even attempted that route. Any direct assistance is greatly appreciated! If you have links to items, even better! Thanks,


Link to comment
Share on other sites

Maybe start with perusing online parts diagrams for your truck, at least for the lights/brackets for mouting the lights up front, and connectors.


However, it would not surprise me if, after isntalling everything, and wiring the switch and lights up to their stock location, the bcm also has to be reprogrammed for the fog lights to work (and for the light on the instrument panel, if it has one, to turn on/off properly).


If you don't get other help and/or can't find the answer by googling, you might consider skipping the time/expense of hooking it up the oem way and just wiring the lights up directly (well, via a fuse/relay), or testing that wherever the fog lights get their power/ground from, gets power/ground appropriately when the button is pushed.

Link to comment
Share on other sites

Thanks for that! I’ve googled plenty but keep getting hung up on what exactly I need. Some say relay, some say no relay, but need wiring harness, switch, and light assemblies (of course). This is a new project for me as I haven’t done anything with lights yet. Mostly mechanical stuff. I think I may be getting mixed info between those people who are just replacing their existing fogs, so the initial step of ensuring all the needed components are present, is where I need to be. So that’s why I came here! 🍻 

Link to comment
Share on other sites

  • 2 weeks later...

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

By using this site, you agree to our Terms of Use.