Installing factory fog lights, '04 silverado

[Colby 04]

what if the truck already has fog harness' hanging? My neighbor has a 2004 that didn't come equipped with factory fogs, but I'm trying to get him set up. His truck already has the harness hanging for the lights, but no switch - not sure if he has the fog relay, can we just install the lights and switch and have the BCM reprogrammed(if needed)? The harness that comes in that kit, I assume it is running down to the fogs for power?

[Bob T]

Originally Posted by Colby 04

what if the truck already has fog harness' hanging? My neighbor has a 2004 that didn't come equipped with factory fogs, but I'm trying to get him set up. His truck already has the harness hanging for the lights, but no switch - not sure if he has the fog relay, can we just install the lights and switch and have the BCM reprogrammed(if needed)? The harness that comes in that kit, I assume it is running down to the fogs for power?

The harness that came with my kit runs from the under hood fuse box to the lights. The harness that goes to the fog/cargo light switch was already set up for both switches.

[Todd55]

I installed these on my 03 Silvy Single Cab and used my original dam, there is a molding cast mark right were you need to cut for the foglamps. The kit I ordered did not include the airdam. And my BCM did need to be reprogrammed. I assume it is because it is a single cab as opposed to a extended.

Todd

[enine]

How did you mount the lamps once you cut the holes, what do they mount to?

[Colby 04]

Originally Posted by enine

How did you mount the lamps once you cut the holes, what do they mount to?

the factory fogs on the 03+ mount to the bottom edge of the bumper with speed nut clips.

[Colby 04]

Update.

Fog lights worked on my neighbor's 2004 Silverado. Had to buy switch, lights and the relay. Installed everything and they work, no reprogramming of the BCM required

[j20m715]

Is there a kit for the 05-06 denali ? Yes I know all denali's had them.
I have an 04 yukon with Denali frt clip.
If so can you quote me a price ?

Thanks

[05Quadrasteer]

Bob,

A big thanks to you for the step by step instructions. I did my installation today and if I had followed the directions with the wrong diagram my lights might not be working now. Everything went well and the lights worked immediately.

Have a great Merry Christmas.

Bill

[Bob T]

Glad it worked for you.

[ScreaminZ400]

Originally Posted by Bob T

The wire plugs into the hole just to the left of the red wire in the top row.

where is this red wire whats the location of it do u remember? and do u think it is the same for a 00 model?

[RealREBEL21]

i tried installing factory foglights on a 2002 Z71, i got them all hooked up right and everything but they still didnt work and i was told i needed a VIN# so the BCM will recognize the foglights, is this true? or is there another way i can get em workin? thanks

[Bob T]

Originally Posted by ScreaminZ400

where is this red wire whats the location of it do u remember? and do u think it is the same for a 00 model?

The red wire is in the plug shown in the photos; goes into the bottom of the fuse block. Dunno about '00.

i tried installing factory foglights on a 2002 Z71, i got them all hooked up right and everything but they still didnt work and i was told i needed a VIN# so the BCM will recognize the foglights, is this true? or is there another way i can get em workin? thanks

I think the computer already knows the VIN. I think what you are referring to is installing a factory radio. It has something to do with theft resistance... radio sniffs the computer's VIN to see if it is in the right vehicle.

[Nick]

Originally Posted by RealREBEL21

i tried installing factory foglights on a 2002 Z71, i got them all hooked up right and everything but they still didnt work and i was told i needed a VIN# so the BCM will recognize the foglights, is this true? or is there another way i can get em workin? thanks

On 99-02 you have to get the dealer to program the BCM for the foglights.

You only need the VIN on 03+ for the factory radio.

[964x4]

Originally Posted by nickboudro

hmmm...if you didnt have to get it reprogrammed, and the harness was already there hanging, sounds like the truck already had fog lights, someone just removed them. may be wrong, but thats what it sounds like.

I think just some random trucks got the full wiring harness and some didn't.My '02 had all the wiring but no switch,relay or holes in the valance.Mark hooked me up with the whole kit but i still needed to program my bcm.

[05BlackBabe4x4]

Finally I found my next mod

[964x4]

Btw, The dealer only charged me $20 to program my bcm.YMMV

[Colby 04]

Originally Posted by nickboudro

hmmm...if you didnt have to get it reprogrammed, and the harness was already there hanging, sounds like the truck already had fog lights, someone just removed them. may be wrong, but thats what it sounds like.

No, he bought the truck brand new, no tow hooks or fog lights. The only thing that was there was the harness running from the relay to the lights. The relay, switch and lights were not installed from the factory. The valance openings were filled in as well.

[964x4]

Originally Posted by Colby 04

No, he bought the truck brand new, no tow hooks or fog lights. The only thing that was there was the harness running from the relay to the lights. The relay, switch and lights were not installed from the factory. The valance openings were filled in as well.

Yeah , thats how mine was.The dealer thought i should change the lower harness anyway as long as i had one cause the original ends were a little crudded up.

[enine]

I bet the dealer swapped them. Someone probably wanted a truck that didn't have fog lights and the dealer swapped the air dam and lights between the two because the non fog light trucks don't get the wiring harness and its easier for the dealer to stick on a new harness than pull the one off with the fog lights.

[Colby 04]

Originally Posted by enine

I bet the dealer swapped them. Someone probably wanted a truck that didn't have fog lights and the dealer swapped the air dam and lights between the two because the non fog light trucks don't get the wiring harness and its easier for the dealer to stick on a new harness than pull the one off with the fog lights.

oh, is that how that works, wonder how they go about deleting the RPO and adjusting the sticker price

The newer trucks are wired for a lot of accessories that aren't included on some models. My buddy had an 03 with no cruise control, he bought the signal lever switch that had cruise, plugged it in and he had cruise control. I don't have a tranny temp guage, but it's wired for it, does that mean I got robbed by the dealer?
I'm not trying to start a pissing match, but there have been a few members that have done this mod and had harness' for the lights