2019 custom trail boss fog lights

HomeCokedale · September 1, 2019

Hi folks been a Jeep owner for almost 30 years so my new Chevy 2019 Custom trail boss Silverado is a completely different world for me. I had a few questions and was hoping someone could advise me:

1: I have the custom trail boss, so I had dealership put in the Chevy fog lights package for me due to where I work, I really need them. Unfortunately, it’s been back to the dealer twice where they don’t turn on when I press the button. The indicator light illuminates on the dash, but the fog lights don’t turn on. My dealership is willing to look at it for a third time but anyone have advice or assistance I can tell the mechanics? I mean it’s fog lights, how hard can it be but they are telling me Chevy has to produce a code which can take hours. As a Jeep enthusiast, I guess I am not understanding what’s so hard about fog-lights.

2: When I auto start my custom trail boss the AC comes on full blast. It doesn’t remember my prior settings. Is this normal? After I auto start the truck after ten minutes or so it’s nice and cool but it’s full blast which i find odd. Even in the cooler part of the morning and night, I tested settings with heat but the ac still comes on. Since this is a a custom trail boss it is single zone.

3: instrument panel dimming. I hit the + and - icons but nothing happens unless completely dark outside. Is this normal? Can I adjust the illumination brightness during daylight hours particularly very early in morning or late in the afternoon?

any help would be appreciated. Dealership already told me they had to replace a “computer” module to originally fix the fog light situation which ended up not working a day later. So when I take the custom trail boss back to the dealership I would like to have knowledge to rebuttal with. Thanks folks.

Sin City Trail Boss · September 1, 2019

2 hours ago, Jon Conroy said:

Hi folks been a Jeep owner for almost 30 years so my new Chevy 2019 Custom trail boss Silverado is a completely different world for me. I had a few questions and was hoping someone could advise me:

1: I have the custom trail boss, so I had dealership put in the Chevy fog lights package for me due to where I work, I really need them. Unfortunately, it’s been back to the dealer twice where they don’t turn on when I press the button. The indicator light illuminates on the dash, but the fog lights don’t turn on. My dealership is willing to look at it for a third time but anyone have advice or assistance I can tell the mechanics? I mean it’s fog lights, how hard can it be but they are telling me Chevy has to produce a code which can take hours. As a Jeep enthusiast, I guess I am not understanding what’s so hard about fog-lights.

2: When I auto start my custom trail boss the AC comes on full blast. It doesn’t remember my prior settings. Is this normal? After I auto start the truck after ten minutes or so it’s nice and cool but it’s full blast which i find odd. Even in the cooler part of the morning and night, I tested settings with heat but the ac still comes on. Since this is a a custom trail boss it is single zone.

3: instrument panel dimming. I hit the + and - icons but nothing happens unless completely dark outside. Is this normal? Can I adjust the illumination brightness during daylight hours particularly very early in morning or late in the afternoon?

any help would be appreciated. Dealership already told me they had to replace a “computer” module to originally fix the fog light situation which ended up not working a day later. So when I take the custom trail boss back to the dealership I would like to have knowledge to rebuttal with. Thanks folks.

For the fog lights it's a computer programming problem most likely. They need to make it right if you paid them for it.

The AC, mine does the same thing. It goes full blast. I am told supposedly the temperature is determined by how hot or cold it is outside. So if it's hot it'll turn the AC and if it's cold it'll turn on heat. I don't know how true that is. It's been 100+ degrees since I bought my truck so haven't had the chance to test that theory.

The +/- I think only works when you're driving at night. But I could be wrong.

Edited September 1, 2019 by Sin City Trail Boss

Gatorbeware · September 3, 2019

I don't think fog lights need a computer to work. Check the pins in the wire harness. It's behind the bumper, on the passenger side. To access the harness, you have to pull a few of the harness clips out of the bumper, so you can separate the connector (pull the red tab to depress the locking clip)