GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 3 of 3
  1. #1

    Default 2003 Envoy stereo install

    my cd player in my 03 Envoy is skipping more and more lately. I am looking at updating the head unit and was wondering which parts i need.

    I know the wiring harness and mounting kit are required, but are there any other modules i need to retain certain features (stereo running while car is off, door chimes, etc.)

    Plus, it is a 6 speaker system, will i need to add an amp to retain this or is there a way to run 6 off of a 50x4 head unit?

    Thanks for your help folks.

  2. #2


    These guys have always been helpful to me.

    Not sure if they can tell you everything you need to know, but it’s worth a try.

    Click on the outfit my car for vehicle specific help.

    On the right hand side.

    Technology is great, when it Works,
    And one Big Pain in the Ass When it Doesnt.
    Detroit Iron Rules, All the Rest are Just Toys.
    94 GMC Burban, 5.7L (350), 4X4, Auto
    86 GMC Burban, 350, 2 WD, Auto
    79 GMC pickup plow truck, 400, Full time 4X4, Auto
    86 Pontiac Fiero SE, 2.8L, Auto, only mid engine American car
    See a Pattern yet?

    15 year GM assembly line worker.

  3. #3
    Jr. Engineer Rumpamuro's Avatar
    Join Date
    Apr 2007
    Mississauga, Ontario (Canada)


    Theres one more thing you will need indefineately and that is either a relocation T-harness, why? well because your radio controls your door chimes, lights, and well nothing really important but you ABS and AIRBAGS lol so yea u definetly want to pick that up, basically all you have to do after is simply, plug in the harness to the stock harness, run the cable down the side to the back of your vehicle, plug inthe stock radio, and where the stock deck would be, youll have wires for speakers, ground, power etc. from my experience, ive always ran it to under the drivers seat and plugged in the stock radio under the seat this wasy its hidden and out of harms way, just remember to turn the volume down or else theyll mix up with ur aftermarket sound. The other alternative is to buy this T- harness module, but it c osts way more, but is very simple,plug in the harness tgo the stock harness, the module is hardwired in the harness so just tuck that away somewhere it wont get in the way and hook up your aftermarket radio.

    From my experience, with the huge harness application, the 12v ignition wire to turn the deck on and the driver front speaker wires never work, they both go to a relay, ive asked pros why it does that or why there even is a relay and they just tell me just get a 12v ignition from the fuse box, and splice the speaker wire from before the relay.

    another thing is, if you wanted to run your speakers through an amp, and u get the huge harness, if you want to get lazy and cut the work in half, you recieve wires for the alll speakers on the harness to the stock radio so u can not plug them in on your aftermarket radio, and where they come on the stock radio cut the wires there, and run them to your amp, its a cheap, fast way and lazy way out but it works,

    if i had the 6 speakers i would not put the amp unless u want to go all out, i would just piggy back them on anothe rspeaker.

Similar Threads

  1. Aftermarket stereo install
    By thump4863 in forum Audio, Video & Gadget Tech
    Replies: 23
    Last: 12-26-2010, 09:29 PM
  2. Newbie with 03+ Stereo install issues
    By ShortyzKustomz in forum Audio, Video & Gadget Tech
    Replies: 11
    Last: 11-07-2009, 10:40 AM
  3. 95-99 Stereo Install and Diagnose
    By Dr_Zero in forum Audio, Video & Gadget Tech
    Replies: 5
    Last: 01-25-2009, 10:18 AM
  4. 2007 Envoy Denali stereo install
    By MannyO in forum Audio, Video & Gadget Tech
    Replies: 1
    Last: 01-21-2009, 01:09 AM
  5. Stereo Install...Need Some Advice
    By toolskizm in forum Chevy Silverado Forum (GMC Sierra)
    Replies: 4
    Last: 01-17-2009, 07:45 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts