Jump to content

Tricks for running wire through firewall?

CamJake
 Share

Recommended Posts

CamJake Enthusiast

CamJake

Posted
Posted

Where is everyone running wires through the firewall on their '14s? Access is very limited under the dash. The big harness on the driver's side would be nice but I couldn't find where my snake poked through. I'd like to avoid drilling a new hole.

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted

Where is everyone running wires through the firewall on their '14s? Access is very limited under the dash. The big harness on the driver's side would be nice but I couldn't find where my snake poked through. I'd like to avoid drilling a new hole.

There's a big rubber grommet next to the steering column. Cut the nipple protrusion and fish your snake thru. It will come out above the parking brake

 

 

Sent from my iPhone using Tapatalk

  • Like 4
CamJake Enthusiast

CamJake

Posted
  • Author
Posted

There's a big rubber grommet next to the steering column. Cut the nipple protrusion and fish your snake thru. It will come out above the parking brake

Sent from my iPhone using Tapatalk

Thanks, that's the grommet I was looking at. I'll give that a shot
  • Like 1
Maxsuperdog Enthusiast

Maxsuperdog

Posted
Posted

Unbolt the black box next to the parking break and you'll have just a little more access to it.

  • Like 2
pgamboa Senior Enthusiast

pgamboa

Posted
Posted

Thanks, that's the grommet I was looking at. I'll give that a shot

Be careful coming in... go slow. It helps if you have a 2nd person on the footwell side to see when it comes through. I did mine solo when I installed the Kicker VSS system (needs power ran to the battery).

 

If you feel resistance or hit a wall, you're probably hitting the back side of the X61A Junction Box. That's the box with the black cover mentioned above... next to the E-Brake.

 

If you're using something like a coat hanger, put some electrical tape on the tip to protect and wires as you come through.

 

Good Luck!

 

 

Sent from my iPhone using Tapatalk

  • Like 4
slee3247 Enthusiast

slee3247

Posted
Posted

I ran it through the grommet next to the steering column as so many others have with no issues whatsoever. Now my music is rocking :nopity:

  • 2 months later...
thatryan Enthusiast

thatryan

Posted
Posted

Ha just google and came to this thread. Been trying to get my kicker power through that grommet for an hour now. :(

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted

Ha just google and came to this thread. Been trying to get my kicker power through that grommet for an hour now. :(

Unwind a metal clothes hanger

 

 

Sent from my iPhone using Tapatalk

chrispassas21 Enthusiast

chrispassas21

Posted
Posted

I've tried too and could never get it through

 

 

2015 1500 LT Silverado Midnight Edition

Sent from my iPhone using Tapatalk

cmysstailights Enthusiast

cmysstailights

Posted
Posted

On passanger side there is a nice spot. Takes a little to get threw but works. Found it on this site, that's were I ran my power and ground

 

Sent from my SM-G935P using Tapatalk

Maxsuperdog Enthusiast

Maxsuperdog

Posted
Posted

On mine there was another grommet within the bigger grommet. Once i removed it from the inside i had no problems getting O gauge wire thru. Unbolting the black box will give you just a little more room to get in there.

L86 All Terrain Senior Enthusiast

L86 All Terrain

Posted
Posted

The grommet will self seal tight to your wires, i taped my wires onto a sharpened piece of coat hanger and made a new hole beside the wiring harness to avoid poking a wire in the harness. Still tight as a virgin after 2 years.

  • 4 months later...
CheeseHead...WI Enthusiast

CheeseHead...WI

Posted
Posted

I cannot for the life of me get through the firewall.....I cut the little access hole by the drivers side, moved the black box, even was desperate and asked the wife to push the wire in. I hear it, just cannot find it. 

I am no contortionist to get my fat a$$ under the dash, so this is really make me mad. This is all I need to complete my 30” rough country led bar and x2 8” led reverse lights.

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted
I cannot for the life of me get through the firewall.....I cut the little access hole by the drivers side, moved the black box, even was desperate and asked the wife to push the wire in. I hear it, just cannot find it. 
I am no contortionist to get my fat a$$ under the dash, so this is really make me mad. This is all I need to complete my 30” rough country led bar and x2 8” led reverse lights.



Try a metal clothes hanger


Sent from my iPhone using Tapatalk

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,894
    Total Members
    8,960
    Most Online
    TopBo
    Newest Member
    TopBo
    Joined

  • Who's Online   1 Member, 0 Anonymous, 869 Guests (See full list)

  • Latest Articles

  • Posts

    • davester
      New to Me 2010 SLE (Quirks, Issues)

      By davester · Posted

      not all plugs will be used.  gm uses more generic harnesses that support most/all options, and if your truck doesn't have a specfiic option, the plug won't be used (commonly will have a dummy insert in the plug , or it'll be taped up, but some may just be left as is).  But it's sldo possible some p.o. has installed the wrong/cheaper parts that aren't correct for your vehicle...
    • fm2176
      New to Me 2010 SLE (Quirks, Issues)

      By fm2176 · Posted

      First off, I'm not trying to just get easy advice/fixes for the issues I've noticed so far.  I'll be combing through the site via searches and such, and if past experiences are any indication, should find what I need.  For the sake of conversation, though, I figured I'd post the handful of things I've noticed in the 12 hours since buying my 2010 SLE CCSB.     Indicator lights: Airbag and TPMS.  The tire pressures aren't reading for any of the wheels, so I'm pretty certain the sensors were either removed, are damaged, or are otherwise inoperable.  I used to mount and balance tires 25 years ago but am pretty much ignorant when it comes to TPMS.  My 2006 didn't have the sensors and this might be the fourth vehicle I've owned that does.     Radio: Rear speakers aren't working.  I removed the driver's side rear door panel and checked the speaker and wiring.  I also removed the sill and b-pillar covers to check the wiring.  A few minutes of Google Fu showed that this is potentially a head unit issue.    Switches: Power mirrors don't turn left/right.  I ordered replacement driver's door switches that should arrive tomorrow.  The windows and locks work but it was only about $20 for all of them.  The driver's side rear window switch lets the window down but won't put it back up.  I think the passenger rear doesn't work at all.  In the coming days/weeks, I'll break out my multimeter to check all of that.   Unknown wiring harness: There's a box attached to the front driver's side of the engine compartment, right where the second battery shelf is located.  There are three plugs, one of which looks like it fits a standard headlight-style bulb (9007 or similar).  It doesn't look like it's plugged into anything.  I'll do some digging and if I don't see anything elsewhere on the site, post some pictures here.   Unknown plugs on brake booster: There are at least two female plugs on the brake booster that aren't being used.  I think it might be a replacement/aftermarket, so maybe those are used for a different application, as there don't seem to be any unplugged harnesses and no indicator lights are on.   Little squeaks when turning: Sounds almost like a bushing around the bed of the truck.  I'll have to pay close attention as I get more familiar with the truck.   Clunk on acceleration: possibly the infamous drivetrain clunk.  My 2006 had it and I'm just not familiar enough with this truck yet to fully grasp what it is.   Anyway, my apologies for the vague and all over the place post.  This truck is new to me, and it's been four years since I drove my 2006.  With 200k miles, I know I'll need to learn this truck quickly to avoid having any major issues, despite being confident it's got much more life to it.  My 2006 had nearly 320k on it when I parked it (nearly 300k of which I put on the truck), and it was still drivable then, though I suspected the head gasket might have blown.  I'd hoped to have that truck back by now, but it's gone forever, as I detailed in my reintroduction thread.  
    • lowrider
      Range RA007 DFM Module

      By lowrider · Posted

      I always drive in Sport mode. With more driving, I am finding the initial response when accelerating is much quicker now🖕 Lou
    • Tyler Gibbs
      2022 2500HD with a new RSI SmartCap

      By Tyler Gibbs · Posted

      Is it an optical illusion in the pic or is the truck really squatting that much horribly?
    • fm2176
      It's Been a Long Time...

      By fm2176 · Posted

      My initial introduction was here.  It's hard to believe that I last posted in February 2013, having just deployed to Kyrgyzstan.  Since then, I've retired from the military and the 2006 Sierra SLT Z71 that first brought me to these pages was lost.  I went forward to Afghanistan in March 2013 and did a lot of sitting behind a computer on brigade staff.  Within 18 months of getting back to the States, I was selected for Drill Sergeant duty, after which I moved back to Virginia (my home state and where I served from 2004-2008).  That '06 Sierra did a lot of driving between Louisiana, Georgia, and Virginia, and ended up with nearly 320k miles by 2022.  By then, the registration had been expired for a couple of years, but the pandemic had all but eliminated tickets for such transgressions.  Admittedly too, I usually drove my wife's SUV or son's car the 2-3 times a week I had to report to work.  Teleworking sure was fun while it lasted.   I started my retirement leave four years ago and stored the Sierra at my sister's house.  A big mess was made when her fiancé passed while she was taking care of business out-of-state in late-2024, and his son pretty much mismanaged everything to do with the estate.  Even so, I was assured that my truck was safe... until it wasn't.  I found out that my truck had been scrapped about four months after the son took over everything.  There's nothing I could do; I'm 1000 miles away and it was technically abandoned property since he'd even trespassed my sister from her own house (she had no claim to it as she wasn't married, and the fiancé was the sole owner).     Anyway, today I got my second Sierra.  This is a 2010 SLE 2WB CCSB with a little over 200k miles on it.  It's got the 5.3L I'm familiar with and should handle what I need it for.  Hauling stuff that won't fit in the Transit Connect (yep, I sold out, but that's the wife's vehicle) and towing a few times a year tops.  The price seemed decent, considering how much people sell their trucks for in the Deep South: $4500.  I've seen similar trucks listed for more than double that.  I got it from a coworker who left his tag on until we transfer the title next week (Louisiana requires a notary for transfers), so I've been driving it all day.  The rear speakers don't work, which is one of the things that brought me back to these forums earlier.  I can't say how active I'll be as a poster, but I'll be scouring the archives while I find out every little thing I can about the 2010s and particular nuances/problems with my truck.   It's definitely not a GMC, but I got another Willys Jeep a few months back as well, so I'm almost at the same place I was when I first joined gm-trucks.com.  My old 1960 DJ3A was sold back around 2010 or 2011; my current Jeep is a 1946 CJ2A.  So, I've got a slightly newer GMC and a much older Jeep.  I kind of wish I still had that F-250 I had way back when too.  The Dakota is long gone and was technically my brother's truck, though I had it registered and insured.  The F-250 had to go when my grandmother's house was foreclosed on due to mismanagement around 2012 or so.     Hopefully anyone that made it this far isn't too annoyed.  I tend to be long-winded, but I'll be doing more reading than posting in the coming months.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...