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Stereo Mods - Adding an amp and harness

MesaRat

By MesaRat
in Modifications & Accessories

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Knighti2 Enthusiast

Knighti2

Posted
Posted

Im looking to get the LLJ harness and asked them where to look for the vehicle connector they ask about (black/gray or aqua/tan).  They said to look and I quote "they will be behind the glove box, above the rear seat".

For anyone that might know these connectors and location that statement confused me a bit.  Is that both places, a mistype from them maybe, or the storage boxes in the rear seats above them?

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Reaper5699
Reaper5699

Speakers were a night and day difference.  Once you take the stock speakers out, you'll wonder how they even made sound as poorly as they are made.  The magnets on them were so small.  Swapping the re

Reaper5699
Reaper5699

I replaced the front dash and door speakers with a Kenwood set KFC-XP6903C.  They sound great and I don't really think it needs an amp for my use....gets loud enough without distortion.  The dash spea

FirstAscent
FirstAscent

I believe the whole interior is the same, also the additional larger GM underseat storage is the same part number for HD and 1500’s. I can’t confirm that but someone else did in another thread. So I t

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kmoon81 New Member

kmoon81

Posted
Posted (edited)
4 hours ago, Knighti2 said:

Im looking to get the LLJ harness and asked them where to look for the vehicle connector they ask about (black/gray or aqua/tan).  They said to look and I quote "they will be behind the glove box, above the rear seat".

For anyone that might know these connectors and location that statement confused me a bit.  Is that both places, a mistype from them maybe, or the storage boxes in the rear seats above them?

Passenger side front, below the right side of the glove box. I just stuck my phone camera near the floor board and turned on the forward facing camera and snapped a bunch of pics under the glovebox. After zooming on one of the photos I was able to locate my aqua/tan connectors in the jumble of wires. 

3F196B2C-760E-49F1-A58B-5E4BB1B19940.jpeg

FAE3F350-E28B-40DA-8414-5AB98102D3A9.jpeg

Edited by kmoon81
Knighti2 Enthusiast

Knighti2

Posted
Posted

Thanks kmoon81.  Yeah got an email me back clarifying what he had meant to type was glove box above "kick panel" and he had typed rear seat.

 

So I did find them but appreciate your insight. 

Knighti2 Enthusiast

Knighti2

Posted
Posted

I ordered the harness as well.  I did order the Audio Control LC7i as well.   Killing me having to wait again for few weeks to get this all wrapped up as the sound in my truck as stock is way disappointing. 

  • 3 weeks later...
ero2 Enthusiast

ero2

Posted
Posted

Hey all!  Not to hijack the thread or anything, but...

 

I have an elevation with the 8in screen, but no Bose.  The sound is pretty rough, even for audio books, lol.  I'd like to leave the stock wiring alone (guess I'm getting old?), but am not confident that simply replacing the stock speakers will bring much better sound...I listen to punk, metal, rock, etc. so don't need boom, just better low and mid.  Would just replacing the speakers with higher end ones help?  It looks like crutch field recommends 6.5 or 6x3/4 in the front, and 6x9s in the rear?

 

Everyone here that went with no amp, just speakers, still happy with that decision?  Thanks!

03 Cobra Enthusiast

03 Cobra

Posted
Posted

Hey Guys I am not an audiophile by any stretch of the imagination, and this may or may not be a good deal and it may or may not be a good set up but I thought I'd point this out.  The link below takes you to one with an amp.  The one w/o the amp is much less $$.  Buy it before 6/30 and you get 20% off.  

 

https://accessories.gmc.com/product/electronics/200-watt-subwoofer-and-200-watt-amp-kit-by-kicker-associated-accessories-19417165?model=Sierra 3500 HD&modelId=6581&bodyId=22&body=Crew Cab Pickup&wheelId=349&wheel=Standard Box&trimId=556&trim=SLE&driveId=8&drive=4WD&engineId=17733&engine=6.6L V8 GAS&bodyNumDoors=5&year=2021&make=GMC&categoryId=12013

  • 2 weeks later...
deoutdoors Enthusiast

deoutdoors

Posted
Posted

If anyone is interested in purchasing the kicker 19417165

 

send me a pm. Just pulled it out of my 6 month old truck that I sold.

 

make me an offer

  • 9 months later...
49Justin Hail New Member

49Justin Hail

Posted
Posted
On 3/12/2020 at 8:10 PM, Reaper5699 said:

https://lljcustoms.com/

 

He makes a harness that plugs in....has several options for it.  I was going to order one, but settled on replacing the front 4 speakers and adding an amp/mtx solobaric.

I made an account just to thank Reaper for a post from 2yrs ago.  I've been on the hunt for this harness for weeks now.  CF is more and out of stock, Metra doesn't make them still supposedly and I'm not paying that much for Gen5DIYs version.  So thanks Man.  Spreading the word of this post too since no one I've asked knew about this.

  • 6 months later...
DScott3370 Enthusiast

DScott3370

Posted
Posted (edited)

I’m updating this old thread with my experiences from modifying the 2020 Silverado Trail Boss stereo system and now more recently my new HD Duramax stereo system. On the first truck I ordered a harness from LLJ customs. Took a month and it did not work correctly. I got no response from him. I found John from Audio Integrated Solutions (AIS) on this site. Sent the harness to him and he corrected everything. It worked perfectly and the turn around time was days. This latest truck I contacted John and he built me a harness in a matter of days as well. His work is flawless. His knowledge is vast, and he knows these GM wiring schematics inside out. Send him a picture of the RPC tag on the door, tell him what you are installing and he will get it to you. For 200 or less… in my case

 

[email protected] (Is his email)

Edited by DScott3370
Added email address
  • Like 1
  • 5 weeks later...
CT Chevy Connoisseur Enthusiast

CT Chevy Connoisseur

Posted
Posted
On 11/6/2022 at 8:02 AM, DScott3370 said:

I’m updating this old thread with my experiences from modifying the 2020 Silverado Trail Boss stereo system and now more recently my new HD Duramax stereo system. On the first truck I ordered a harness from LLJ customs. Took a month and it did not work correctly. I got no response from him. I found John from Audio Integrated Solutions (AIS) on this site. Sent the harness to him and he corrected everything. It worked perfectly and the turn around time was days. This latest truck I contacted John and he built me a harness in a matter of days as well. His work is flawless. His knowledge is vast, and he knows these GM wiring schematics inside out. Send him a picture of the RPC tag on the door, tell him what you are installing and he will get it to you. For 200 or less… in my case

 

[email protected] (Is his email)

Interesting that you had such as issue with LLJ Customs, you are the first I've heard to have any issues with them.  The process with them was flawless for me and they were very responsive to my questions.

 

That being said, having options is always good.

  • 2 weeks later...
DScott3370 Enthusiast

DScott3370

Posted
Posted

Best I can tell is that he was overwhelmed in late 2019. There were a few discussions about LLJ back then on the half ton forum. I’m glad to hear he got it together. I still highly recommend AIS. 

  • 10 months later...
Mshawn Enthusiast

Mshawn

Posted
Posted
On 3/11/2020 at 11:51 PM, MesaRat said:

Does anyone know if there are aftermarket general harnesses or loop harnesses that plug between the back of the infotainment system and the body harness?  I want to be able to take the audio signal from each of the speakers, send it to the rear of the truck into a DSP and amp, and then back to the body harness and into the speakers.  I don't want to cut factory wiring.  I've checked Crutchfield and a little bit online but i don't seem to see anything for 2020.

 

New to GM trucks and dealer is currently locating my truck for a dealer swap, and appreciate any help or input.

 

Thanks

MR

What harness did you use for this? I want to do the same-thing with the door speakers. I would like a little more power out of them. I’ve replaced all the door speakers and the dash speakers. Thanks in advance

  • 1 year later...
305CHEVYBOYZ New Member

305CHEVYBOYZ

Posted
Posted

I have a 2022 chevy silverado 1500 

Installed a kicker amp but I get feedback back from the radio like something loose you hear feed from the speaker, weird thing is the amp turns on Without the remote blue wire like it's getting power from the speaker rca jacks ?

Epsilon Plus Enthusiast

Epsilon Plus

Posted
Posted (edited)

Anyone do a single sub box like something on the passenger rear to middle areas that fits nice? Trying to preserve the driver side rear under seat as I carry a tool bag of emergency stuff there. The GM Kicker would work but I hesitate spending $700 bucks on something that barely knocks with 200w.

 

EDIT: Found a box that fits nice on driver side, guess I can move my stuff over 😆

Edited by Epsilon Plus

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