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

[kbuskill]

What is the big 3 upgrade?

Here you go...

https://mobileinstallguide.com/big-3/#:~:text=The Big 3 Upgrade is a relatively inexpensive,wire or replacing the factory wire all together.

1. Alternator to positive battery terminal.
2. Negative terminal to chassis.
3. Chassis to engine block.
= Big 3 upgrade

I actually added an extra 2/0 cable from the engine block to the chassis since these trucks don't have one from the factory...


These trucks come with a negative cable that goes from the battery down to the engine block and then just a small braided ground strap from the back of the drivers head up to the firewall, but nothing from the engine block down to the chassis.

Here you can see that the 2/0 cable from the battery to engine block just barely fits through the RVC sensor...

 

[Rocket Man]

I built my own cables out of 2/0 Marine grade tinned copper shielded cable and soldered copper lugs on the ends with marine grade (it has a heat activated glue inside) heat shrink. I did what is referred to as "the big 3" upgrade.
View attachment 272394


I used these terminals and soldered them on...
View attachment 272395

I guess it depends on your battery though. Mine has side and top posts.

The 2/0 is definitely overkill but I found a good deal on it.

Nice.

 

[the_tool_man]

The 2/0 is definitely overkill but I found a good deal on it.

Overkill is right! I was looking at 1/0. But really #2 would be plenty. Nice job. I need to do this.

 

[Sparksalot]

Here you go...

https://mobileinstallguide.com/big-3/#:~:text=The Big 3 Upgrade is a relatively inexpensive,wire or replacing the factory wire all together.

1. Alternator to positive battery terminal.
2. Negative terminal to chassis.
3. Chassis to engine block.
= Big 3 upgrade

I actually added an extra 2/0 cable from the engine block to the chassis since these trucks don't have one from the factory...
View attachment 272403

These trucks come with a negative cable that goes from the battery down to the engine block and then just a small braided ground strap from the back of the drivers head up to the firewall, but nothing from the engine block down to the chassis.

Here you can see that the 2/0 cable from the battery to engine block just barely fits through the RVC sensor...
View attachment 272404

I gotcha.
What is the RVC?

 

[gooffeyguy]

I gotcha.
What is the RVC?

I'm guessing Regulated Voltage Control?

In the owners manual, it's called EPM (Electric Power Management).

There is a sensor on the negative battery cable for this

Sent from my SM-G930V using Tapatalk

 

[wsteele]

I gotcha.
What is the RVC?

Here is a tech bulletin from Remy discussing how its works.

https://www.brakepartsinc.com/dam/j...echnical Service Bulletin - November 2017.pdf

 

[Sparksalot]

Here is a tech bulletin from Remy discussing how its works.

https://www.brakepartsinc.com/dam/jcr:dd879eb0-b5a0-4eb3-862b-2cb49f40e18d/13) Technical Service Bulletin - November 2017.pdf

Roughly where is this located by chance.

I just noticed a floating disconnected plug in thecopcar. Also just had a B1516 code pop up.

 

[Geoffsfas10]

Setup my appointment to get my new wheels mounted for friday.....excellent!!

 

[wsteele]

Roughly where is this located by chance.

I just noticed a floating disconnected plug in thecopcar. Also just had a B1516 code pop up.

On my Yukon SLT, the RVC sensor is on the negative battery cable, maybe a foot down the primary run. It is a clamp looking gadget with a snap in connector to a wiring bundle that I assume goes right to the PCM. Not sure if a PPV has the same stuff.

 

[Sparksalot]

On my Yukon SLT, the RVC sensor is on the negative battery cable, maybe a foot down the primary run. It is a clamp looking gadget with a snap in connector to a wiring bundle that I assume goes right to the PCM. Not sure if a PPV has the same stuff.

I just found it exactly there. The dangling plug seems to come from the fans, which actually do run. I wonder if it was left over from the recall/upgrade and just dropped loose.