Blue Behemoth Build Thread (01 Yukon XL)

[Tonyrodz]

Wrong pvc might be the reason you got alot of oil dripping out of the intake.

Btw instructions say to trim to fit, then zip tie together, but I wanted less kinks/angles in the hose, plus slightly longer hose would allow me to easier move it out of the way without needing to remove it if working on something else.

Does hose length matter in this case?

Imo, hose length doesn't really matter. You should be fine. What alot of guys do, including myself--is to put some steel scrubbing wool in addition to the catch can filter. It helps to catch more oil vapors.

 

[Rayyy]

Do you mean add steel wool to the inside of the catch can? Which grit?

 

[Tonyrodz]

Do you mean add steel wool to the inside of the catch can? Which grit?

I used the steel scrubber stuff you clean pots with. Open your catch can and look under the part(top)that the hoses go in/out of. You should see a filter in there. Mine unscrews and allowed me to add the additional filter material to it.

 

[Rayyy]

Ah yes, so stuff even more steel scrubber in there... good idea, will do.

 

[Tonyrodz]

Ah yes, so stuff even more steel scrubber in there... good idea, will do.

View attachment 250538 View attachment 250539

Did it have a filter in it already?

 

[Rayyy]

Yup, looks like steel scrubby filter type material already in there.

 

[Rayyy]

Updated the fog light housing in the 01 Yukon... They work great, but only when headlights are off. When the headlights get turned on, fog lights immediately turn off.

Is this normal?

 

[PG01]

Updated the fog light housing in the 01 Yukon... They work great, but only when headlights are off. When the headlights get turned on, fog lights immediately turn off.

Is this normal?

Negative, fogs should stay on with headlights...iirc on the nbs fogs on even with highs.

 

[Rocket Man]

Updated the fog light housing in the 01 Yukon... They work great, but only when headlights are off. When the headlights get turned on, fog lights immediately turn off.

Is this normal?

It’s been so long since I did my lighting mods that I don’t remember for sure but I think the fogs turn off when the high beams are activated but stay on for low beams.

 

[Tonyrodz]

It’s been so long since I did my lighting mods that I don’t remember for sure but I think the fogs turn off when the high beams are activated but stay on for low beams.

^^^^^^^
This

 

[Rayyy]

Hmm something screwy is definitely going on with my headlights.

Could a faulty headlight switch cause this?

 

[Rocket Man]

Hmm something screwy is definitely going on with my headlights.

Could a faulty headlight switch cause this?

Yes, or a bad relay. Try swapping the headlight relay with a different one, they’re used in a few places in the fuse box.

 

[Rayyy]

Swapped a couple different relays around, same thing is happening (when I flip the headlights to on, the fogs turn off). The fogs only work in the parking lamp mode.

My highbeam bulbs are missing at the moment, along with my DRL’s, as I’m in the process of swapping in LED bulbs. I initially had hyper flash (two days), then installed an LED EP29 flasher, which fixed the hyper flash.

Could this have burned out my headlight switch in the meantime?

 

[PG01]

Could be because like mark and Tony so graciously corrected me, when highs go on fogs go out so maybe its not completing a circuit with the high bulbs in..

 

[Rayyy]

Indeed Mark was right, I put the high beams in to test, and the fogs work!

 

[Rocket Man]

Indeed Mark was right, I put the high beams in to test, and the fogs work!

All good now?

 

[Rayyy]

Almost... Last bit of lighting up front, I’m trying to get the DRLs to come on with the Parking Lamps.

One of the DRL sockets is melted, so instead of replacing them, I figured I’d just let it be, and tap into the parking lamp wires so the DRLs come on at the same time as the parking lamps (installed switchbacks in all four sockets).

But somehow the DRLs are not lighting up even though they are wired into the parking lamps.

 

[Rocket Man]

Almost... Last bit of lighting up front, I’m trying to get the DRLs to come on with the Parking Lamps.

One of the DRL sockets is melted, so instead of replacing them, I figured I’d just let it be, and tap into the parking lamp wires so the DRLs come on at the same time as the parking lamps (installed switchbacks in all four sockets).

But somehow the DRLs are not lighting up even though they are wired into the parking lamps.

Are they installed with the correct polarity since they’re LED?

 

[Rayyy]

The DRLs do flash orange, just don’t light up white. I’ll try to flip them around to see if reversed polarity will change anything.

 

[Rayyy]

Ok, it’s the bulbs. I had two different types in there (to compare which is brighter), I swapped them around, and now the DRLs come on when parking lamp switch is on, but not the parking lamps.

Just need to order another set of the bulbs that work.

Given that they are LED, I should be able to get away with this connection set up, ya? No relay required?