Fog lights.

[XTRIK8]

Does anyone know if it is possible, through either wiring or programming, to have your fog lights stay on when your high beams are on?? I have a 2016 GMC Crew Cab. Thank you for any help.

[O_J_Simpson]

Look at the fog light thread.

[BigBadSierra]

Here is the thread with the info you seek.

 

http://www.gm-trucks.com/forums/topic/162734-foglights-on-with-high-beams/

[TJay74]

Thru programming - NO, if you hack the harness and use a diode - YES. Be aware though, if you hack the harness and use the diode and have any issues with the BCM the dealer and GM will deny any warranty coverage for the BCM system and anything related to it. One of the 1500 owners already had this happen, BCM was fried and dealer found his diode jumper and GM denied the coverage. He was out the $500 for the repair.

[newdude]

Not sure why one would want to do this? The high beams are bright as hell on these trucks, and seeing you have a 2016 Sierra HD, you have HID lighting, which should be stupid bright with the high beams to begin with...

[DMAXNAZ]

Gen5diy has the harness for $75. http://www.gen5diy.com/Chevrolet/Silverado/Silverado-Foglamp-Harness/

[SouthpawHD]

Gen5diy has the harness for $75. http://www.gen5diy.com/Chevrolet/Silverado/Silverado-Foglamp-Harness/

Is that considered the same as using a diode as described above?

[DMAXNAZ]

I have no clue. I just remembered seeing the harness when I was on their website before. It has a relay, so maybe it works without a diode?

[MotionMan]

That looks like a well engineered harness. The trigger wire is a great idea. I had PIAAS that did that but the NTSB took that away.