Jump to content

Stereo Mods - Adding an amp and harness

MesaRat

By MesaRat
in Modifications & Accessories

 Share

Recommended Posts

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?

  • Replies 44
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

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

Posted Images

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

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

  • Latest Articles

  • Posts

    • Deadwood
      primary drive belt tensioner

      By Deadwood · Posted

      I bought belts and pulleys for my '20 L5P at Rock Auto a couple years ago. I have used them for many years, and almost always save significant money, especially when I buy maintenance stuff ahead of time.   They carry many OEM parts, which is all I use unless an aftermarket is shown to be same/superior, or if it is an insignificant part or unavailable OEM part anywhere else. RA is usually lower priced, often by a bunch, but parts are sometimes unavailable or out of stock, and I do shop around and sometimes find better prices at other sites.   Be aware that you pay shipping, and if you buy multiple items and they are coming from different warehouses, the shipping can kill the advantage. Planning ahead is best if possible.   If you have a transmission service in the near future, check out their OEM (AC Delco ULV) fluid, usually MUCH less than anywhere else.
    • Deadwood
      10L1000 anyone with High Mileage ? I hate Damocles....

      By Deadwood · Posted

      New member here, very long time occasional guest. Saw this thread, thought it would be a good time to contribute someting. It is only my experience and not a claim that everyone will have the same.   I bought my '20 3500 L5P new and have put 99.9% (literally) of it's current ~400k miles on it myself, with over 50% of that towing loads between 4k to 15k, and to me this truck has been nothing short of amazing. For the first 235k I had zero issues, and from there until 321k I replaced a NOx sensor, two failing glow plugs, and three of the notorious injector connectors. I believe this truck is in part, a testament to good luck, but also good care and following a decent maintenance schedule (I also keep meticulous records.) As a result, it looks as good as a well cared for 70k rig, up and down, inside and out.   At some point before that 321k mile mark I began to get a little spooked about the 10L1000, especially the valve body. Word of mouth about potential issues prompted me to jump on the net to sift through all the noise and determine what all the fuss was about. I routinely take long trips, coast-to-coast and points in between, so roadside breakdowns can be '...a thousand miles from nowhere' and a bit of a challenge, and though I had no issues, my guard was up and activated.   And then I stumbled across a chance to salvage some parts off a new 2025 that had been wrecked in transport. I grabbed a few wear items (alternator, pulleys, etc.) and on a whim asked what the ten speeder would cost me. It was cheap...really cheap. I knew some changes had been made in the '24+ version 10L and were supposedly not compatible, but I called service/parts at my local Chevy dealer and asked why and they didn't know. A call to a well known aftermarket transmission outfit revealed it was very likely it would be fine, but to them not 100% sure.   Because it was cheap (really cheap) and I was spooked, I took the chance. Had it installed by a local shop and it worked like a champ, shifted just like the original. At it's first service at 37k, I had the shop put in a Next Gen valve body kit, which after some initial hiccups and rough shifts, smoothed out though with somewhat firmer shifting.   All that said, I have a very serious concern about my newer transmission as just two weeks ago it suddenly began to exhibit a strong reluctance to engage forward or reverse. It was a bit past due anyway so I took it in for service. The reason it was sticking was due to 'glitter' in the fluid clogging the filter...not good folks, often indicates a converter giving out. We ended up going ahead with the new filter and fluid, first to see if it would move and shift, and then if so buy me a little time. It did, and I've driven it over a thousand miles and it is shifting smooth, no noises or slipping. Regardless, it looks like a third gearbox is in my future so I can resume taking long trips with some confidence. In the very short term, my curiosity will have me examining the fluid to check how much glitter has reappeared.   An earlier poster had alleged, in the context of 10L100 failures, that it is another example of how we seasoned citizens somehow descend into hysteria, lose control of our senses, and react irrationally after brief encounters with the idiocy of the internet infosphere. Let me say (and I have used and abused said internet since it's infancy) there is no segment of the populace that has a corner on over-reaction to digital garbage. Just as my offering of experience in this arena is purely anecdotal and should not be considered gospel or all-encompassing, I believe it is still worthwhile information to consider, along with other relevant anecdotal experiences about things like complex transmissions, especially when balanced with other sources.   So to answer the original question, yes I got high miles out of my first 10L, trouble free for 321,000. Now I really wonder how much longer it would have went. Did I 'overreact' to the internet ghouls by replacing a 'good' one with a 'bad' one? Maybe. Who knows, the thing might have taken a puke a 100 miles later. So I'll just fix it again, then move on and start thinking about all the other stuff that will eventually wear out. It still has the original brakes (they're at ~60%), original injectors/pump, turbo, water pump, etc....pretty much original everything. Knock on wood.
    • swathdiver
      6 Speed vs 8 Speed

      By swathdiver · Posted

      At peak temperature.  They get to cool down and warm up more, especially those with the external cooler.  I have three GMT900s and one of them has over 225K on its original transmission.  Fluid gets changed about every 36K miles, all of it.     It's not the bean counters, it was the government.  They had to meet CAFE standards and other government requirements.   To get around that, we tune them and modify them to our liking.
    • GMCustomerService
      Will not stay in Reverse

      By GMCustomerService · Posted

      Our customers' safety isn't something we take lightly. To ensure you get the proper assistance for your truck's repairs, please fill out the form at https://s.chevy.com/support-request with all pertinent details including your username.
    • GMCustomerService
      2026 Z71 Forward and Rear Park Assist help

      By GMCustomerService · Posted

      We appreciate you sharing your experience with your truck. To ensure we get you the proper assistance, please fill out the form at https://s.chevy.com/support-request with all pertinent details including your username.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...