What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[Rocket Man]

The add-a-circuit isn't needed, just a jumper wire will work, but I found it's easier and adds fused protection to it

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Yep I know. I use those whenever I can though. I couldn’t use one when I did it the other way because I wasn’t tapping into a fuse slot.

 

[cmatt]

The gallon is a better deal, $50 vs $25 for just a quart!

I did notice though, when I checked the links, It said it fits my vehicle but in the notes it says "NEED FRICTION MODIFIER WITH LOCKING/LIMITED SLIP DIFFERENTIALS-USE ADDITIVE 88900330"

Saw that too. The manual doesn’t specify the additive. So I’m chalking it up to Amazon folklore lol.


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[gooffeyguy]

Yep I know. I use those whenever I can though. I couldn’t use one when I did it the other way because I wasn’t tapping into a fuse slot.

I wish I could find a fuse tap type of prong for the relay, instaed of having to squish a wire in/under it.

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[the_tool_man]

Done!

https://www.tahoeyukonforum.com/threads/automatic-foglights.119953/

I'm still catching up...

So if I want the fogs on whenever the truck is on, I still do the original mod using the low beam relay and diode, correct? The lows are always on, which will activate the fogs. Or is the diode even needed then (I leave my headlight selector on AUTO)?

 

[gooffeyguy]

I'm still catching up...

So if I want the fogs on whenever the truck is on, I still do the original mod using the low beam relay and diode, correct? The lows are always on, which will activate the fogs. Or is the diode even needed then (I leave my headlight selector on AUTO)?

Do you have a Yukon or Tahoe?

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[the_tool_man]

Do you have a Yukon or Tahoe?

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Yukon. Sorry I forgot to specify.

 

[gooffeyguy]

Yukon. Sorry I forgot to specify.

Well, thw original way, relay to relay, will have the fogs on basically anytime the vehicle is running, even during the day.

The diode is only used in that setup to be able to just only turn on fogs and parking lights if it's foggy and you don't want the headlights reflected back at you, or you like that look and want to be cool.

The way I posted in this thread is if you don't want the foglights on during the day with the DRLs (low beam headlights on the Yukon). I believe the Tahoe has seperate DRLs from the headlights and isn't effected by this.

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[Rocket Man]

Saw that too. The manual doesn’t specify the additive. So I’m chalking it up to Amazon folklore lol.


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Your G80 is not locking/ limited slip and doesn’t need modifier. You do have a G80 right?

 

[George B]

I wish I could find a fuse tap type of prong for the relay, instaed of having to squish a wire in/under it.

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I was going to use some brass shim stock to make an adapter like the one shown. The shim stock is about as thick as an index card.

 

[Rocket Man]

I was going to use some brass shim stock to make an adapter like the one shown. The shim stock is about as thick as an index card.

You should be able to use that fuse tap shown, just cut the end so it’s a thin flat strip that fits in the relay socket.