Plug found un-plugged

[atobin]

While doing some stereo troubleshooting on my 2000 Tahoe LT, near the amp which is located behind the glove box I saw this blue plug hanging and the place where it should be plugged into. I was set to go up north with the Tahoe and didn't want to unknowingly just plug it back in and leave. Everything has always worked fine with the vehicle, besides the occasional stereo cutting out.

Does anyone know what this plug/harness is used for? My gut was passenger side airbag, but those are from what I've seem very well labeled in yellow.

The 2 other plugs shown are the amp

 

[Doubeleive]

While doing some stereo troubleshooting on my 2000 Tahoe LT, near the amp which is located behind the glove box I saw this blue plug hanging and the place where it should be plugged into. I was set to go up north with the Tahoe and didn't want to unknowingly just plug it back in and leave. Everything has always worked fine with the vehicle, besides the occasional stereo cutting out.

Does anyone know what this plug/harness is used for? My gut was passenger side airbag, but those are from what I've seem very well labeled in yellow.

The 2 other plugs shown are the amp View attachment 251117 View attachment 251118

not 100% sure it's been a while but it looks like the plug for the factory radio amp, if you have aftermarket radio then that amp was likely disconnected and either a separate amp was used or the power from the radio was used instead. the other wires still plugged in could be going to the rear pillar speakers which normally are not used with a aftermarket radio.

 

[atobin]

The Tahoe is 100% stock, it's got nothing aftermarket. The unit in the picture with the 2 plugs attached is the factor amp which I have had out to reset those connections.

 

[Doubeleive]

The Tahoe is 100% stock, it's got nothing aftermarket. The unit in the picture with the 2 plugs attached is the factor amp which I have had out to reset those connections.

does it have the factory base speaker in the rear drivers side panel? if so it could be for that, often the bass speaker is rotted out long ago so it could have been simply disconnected.

 

[Doubeleive]

the only other thing it might be is onstar but depending on the year onstar is usually closer to the radio or under it.

 

[915_Tahoe]

the amp with the 2 connectors looks ok. that other pic, where is that located. i thought it was the BCM(body control module) but it the bcm has a plastic housing.

 

[Big Mama]

I believe you’d get plenty of bells and whistles if the bcm is unplugged

 

[GreyStone]

https://ww2-secure.justanswer.com/u...4_033614_2001_tahoe_radio_wiring_luxury_2.jpg

 

[PG01]

While doing some stereo troubleshooting on my 2000 Tahoe LT, near the amp which is located behind the glove box I saw this blue plug hanging and the place where it should be plugged into. I was set to go up north with the Tahoe and didn't want to unknowingly just plug it back in and leave. Everything has always worked fine with the vehicle, besides the occasional stereo cutting out.

Does anyone know what this plug/harness is used for? My gut was passenger side airbag, but those are from what I've seem very well labeled in yellow.

The 2 other plugs shown are the amp View attachment 251117 View attachment 251118

Looks like someone was in that harness already so maybe previous owner had issue and that was the fix. Plug it in see what happens.... worse case you blow the amp or radio.

 

[Doubeleive]

I believe you’d get plenty of bells and whistles if the bcm is unplugged

unplug the bcm I don't think you would get any bells or whistles be a dead truck

 

[atobin]

the amp with the 2 connectors looks ok. that other pic, where is that located. i thought it was the BCM(body control module) but it the bcm has a plastic housing.

If you'd be setting in the passenger seat, that plug would plug into a female connector, that would be upside down, like facing the windshield. That female
connector is mounted to a metal plate, with another similar next to it, which is plugged in.

To me, it looks like it would be mounted below where the passenger side air bag is located.

 

[915_Tahoe]

Could it be #13, if it is. it's referred to as a receiver for maybe onstar or navigation or a communications module.

 

[atobin]

That could very well be, I do have Onstar which I've never tried. The previous owner may have disconnected it. I'm the 2nd owner.
Would that have anything to do with the message center on the dashboard? That has never worked.

 

[Big Mama]

As was mentioned try plugging it in. Some disconnect On Star thinking they can’t be tracked

 

[wjburken]

Your 2000 Tahoe, if I remember right, came with an Analog Only OnStar system and when OnStar switched to a digital system, they probably just unplugged it since it was not able to be upgraded.

#06-08-46-007A: Information on OnStar Analog-Only Systems - (Sep 22, 2008) Subject: Information on OnStar® Analog-Only Systems Models: 1996-1999 GM Passenger Cars and Trucks Plus: 2002 Buick Rendezvous 2000-2003 Buick Century, Regal 2000-2005 Buick Park Avenue 2000-2001 Cadillac Catera, DeVille, Seville 2000-2002 Cadillac Eldorado, Escalade Models 2000 Chevrolet Impala, Lumina, Monte Carlo 2000-2001 Chevrolet Blazer, TrailBlazer Models 2000-2002 Chevrolet Suburban, Tahoe, Venture 2001-2002 Chevrolet Silverado 2002 Chevrolet Avalanche 2000-2002 GMC Denali, Denali XL, Jimmy, Yukon, Yukon XL 2000-2001 GMC Envoy 2001-2002 GMC Sierra2000-2001 Oldsmobile Bravada 2000-2002 Oldsmobile Intrigue, Silhouette 2000-2002 Pontiac Montana 2001-2002 Pontiac Aztek 2000-2003 Pontiac Grand Prix with OnStar® (RPO UE1) -------------------------------------------------------------------------------- This bulletin is being revised to update the models affected list above. Please discard Corporate Bulletin Number 06-08-46-007 (Section 08 -- Body & Accessories).
-------------------------------------------------------------------------------- All vehicles equipped with OnStar® listed in this bulletin were built with Analog-Only OnStar® Hardware. OnStar® equipped vehicles with analog-only equipment were designed to operate only on the analog wireless network and cannot be upgraded for digital network compatibility. Vehicles with this equipment will no longer be able to receive OnStar® services beginning January 1, 2008. At that time, service will be available only through Dual-Mode (Analog / Digital) equipment. Analog-Only vehicles cannot be upgraded to digital equipment.

 

[greenhornet]

There is a chance it could be the On Star plug that was disconnected when On Star discontinued support for the older Tahoe's. I unplugged mine ,blue plug behind the glove box as 3 G was no longer supported. I had a 2000 Tahoe LT.

 

[Bigshawn]

I agree with Doubeleive, looks like the amp. I have a 2001 gmc yukon slt and that's where my amp is but it could have to do with onstar too. If I remember I will look at mine tomorrow cause mine has onstar. I will look and see if my blue plug is still plugged in. How do you tag someone on here, I've never figured out how

 

[PG01]

I agree with Doubeleive, looks like the amp. I have a 2001 gmc yukon slt and that's where my amp is but it could have to do with onstar too. If I remember I will look at mine tomorrow cause mine has onstar. I will look and see if my blue plug is still plugged in. How do you tag someone on here, I've never figured out how

Just put the @Bigshawn
@Doubeleive @Galante

sometimes you need 2 spaces before the @ and then just start spelling the users name

 

[petethepug]

Harness connectors disconnected usually means accessories have been removed or updated. We made the switch from analog to digital OnStar on our 06 Denali. It was $250 and we got 200 free calling min w/ the swap and a year of service.

07 & 08 OnStar modules have two antenna connections and four harness input connections. One of the harness connections is not used.

The option for BT came 09/10 OnStar modules picked up an extra antenna connector used just for a BT antenna.

2011 OnStar modules were made by LG and they no longer had the 3rd antenna connection for the BT antenna, it was internal.

There’s a possibility the past owner of the truck pulled one of the harness connections for OnStar to disable it from being tracked. Another possibility is they removed a CoStar/BlueStar module for VIM (Vehicle in Morion) Nav input, BT and Movies in the head unit and left it hanging there and it’s now just a wye connection not being used.


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[Greg Carrasco]

I think its the receiver for the Sirius XM radio