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Wiring Help, Please

Core-Lokt
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Core-Lokt Enthusiast

Core-Lokt

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I'm putting in an A-pillar pod/gauges, and I'm asking if anybody can identify a (preferably) fuse for a switched power and illumination circuit on the driver's side interior fuse panel. Offhand, everything I checked with a test light was constant-hot, and I'd much rather uses a piggyback fuse. I can certainly find a wire, but I'd rather not half-tap.

 

Thanks in advance for any help.

Core-Lokt Enthusiast

Core-Lokt

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Thanks; I looked there a few minutes, and I think I can find something. I really never looked there, as I thought it was stuff like PTO/aftermarket bodies/accessories like snow plows.

PBNB Enthusiast

PBNB

Posted
Posted

The upfitter kit is quite a kit! However, GM doesn't want to install it so they give you the parts and show you the door.

 

You get 5 buttons and a separate fuse block as well as some large fuses that got in the battery covers. There were already installed on mine truck but nothing behind them (see the picture). I think the button install would be fun cutting into the plastic but overall, I really like the kit.

 

These are great and can be set to on all the time or switched by the key.

 

On the fuse block you get fuses and relays which makes it easy to connect lights or other high draw devices or gauges. 

 

What gauges are you getting? If Banks, they have an OBD connector which makes connecting them easy, speaking from experience. Some other gauge pods will do the same.Screenshot2024-11-17at12_49_34PM.thumb.png.6f081b8661f69310bdf943c87f076f4d.png

 

So far I have Diode Dynamics fog lights and my dash cam connected. Working on more items to connect.

Core-Lokt Enthusiast

Core-Lokt

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On 7/20/2026 at 7:20 PM, PBNB said:

What gauges are you getting? If Banks, they have an OBD connector which makes connecting them easy, speaking from experience. Some other gauge pods will do the same.So far I have Diode Dynamics fog lights and my dash cam connected. Working on more items to connect.

I know the upfitter switch deal well; my truck didn't have it, so in one day I retrofitted/wired the kit, and since I knew I'd have several panels off, I did the same day a High Country cluster, and console charging/cooling. That charger cooling tube was the worst part of the deal.

 

The gauges are MaxTow. I don't need an iDash, as the HC cluster has all that information, and I'm using the OBD for a pass-through for the Intellihaul cameras? or the GM dash camera?, anyway. I'm ending up going under the hood to the fuse box. I identified constant hot/switched hot/illumination and have some piggyback taps in. Just waiting for an 4-wire 18-gauge cable to come in the 29th to finish. I already ran the sensors, and have the gauges/pod mounted. If I could've found what I needed on the fuse panel by the light switch, they'd be up and going.

IMG_2228.jpeg

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PBNB Enthusiast

PBNB

Posted
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Looks like you have it figured out. Did you run a sensor into the rear diff housing? 

 

What sort of diff temp swings would you see towing or not? I have wondered how hot it can get 

Core-Lokt Enthusiast

Core-Lokt

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Yes; I have a Banks rear cover, and a PPE front with sensors. This weekend I hope to get them heated-up. I’m not planning any towing in the near future, but when I do (and anything notable is observed), I’ll make mention of it.

Core-Lokt Enthusiast

Core-Lokt

Posted
  • Author
Posted
On 7/20/2026 at 7:20 PM, PBNB said:

The upfitter kit is quite a kit! However, GM doesn't want to install it so they give you the parts and show you the door.

 

You get 5 buttons and a separate fuse block as well as some large fuses that got in the battery covers. There were already installed on mine truck but nothing behind them (see the picture). I think the button install would be fun cutting into the plastic but overall, I really like the kit.

 

These are great and can be set to on all the time or switched by the key.

 

On the fuse block you get fuses and relays which makes it easy to connect lights or other high draw devices or gauges. 

 

What gauges are you getting? If Banks, they have an OBD connector which makes connecting them easy, speaking from experience. Some other gauge pods will do the same.Screenshot2024-11-17at12_49_34PM.thumb.png.6f081b8661f69310bdf943c87f076f4d.png

 

So far I have Diode Dynamics fog lights and my dash cam connected. Working on more items to connect.

If you’re interested in any cowl pod lights, I can recommend the Parkwood Welding mounts. Offhand, I only recall one other option from a place in Arizona that was waaayyy more expensive. I have a pic of my truck with the lights in a post, here.

  • 2 weeks later...
Core-Lokt Enthusiast

Core-Lokt

Posted
  • Author
Posted
On 7/27/2026 at 9:44 AM, PBNB said:

Looks like you have it figured out. Did you run a sensor into the rear diff housing? 

 

What sort of diff temp swings would you see towing or not? I have wondered how hot it can get 

In the 6.6 gas thread, I added information in my fluid change thread about these gauges and temperatures. With very limited data, it so far looks like ~30 degrees difference between front and rear.

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