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How to Rewire Speakers in GMC Envoy?

The thought of rewiring speakers in your GMC Envoy seems like a big job. 

It takes a lot of time to know all the wiring in your speaker system to ensure they will work, but making wire connections is actually not that hard. SO, how to rewire speakers in GMC Envoy? Let’s find out.

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Generally, rewiring speakers in GMC Envoy requires the same steps, regardless of where the speakers are located:

  1. Remove the door panels or dash and unscrew the speakers.
  2. Disconnect the speaker wires from the old speakers and remove any wire clips or staples holding them in place.
  3. Run new wires from the stereo or amplifier to each speaker.
  4. Strip the insulation from the ends of the new wires, and twist them together with the corresponding wires from the old speakers.
  5. Secure the twisted wire connection with a wire connector or electrical tape.
  6. Reinstall the speakers, making sure to reconnect the wires securely.
  7. Test the speakers to make sure they’re working correctly.
  8. Re-assemble the door panels.

As an Amazon Associate, ImproveCarAudio will receive a small commission from qualifying purchases made through the links in this article.

Tip: If you do not install an external amplifier, you do not have to replace the factory wires unless the current ones are corroded or damaged.

However, if you have an amplifier or decide to use new wires from the stereo, I recommend using the Knukonceptz.

I have found them to be highly flexible to run through the car chassis, especially in the tight spots where the others happened to be too stiff.

Depending on the model, the Envoy has factory speakers installed in the front doors, rear doors, and dash. In this article, I’ll explain the step-by-step process of rewiring the speakers in your GMC Envoy.

GMC Envoy Overview

The GMC Envoy is a mid-sized SUV that is ideal for everyday driving. It’s big enough to carry people and gear and relatively small to park conveniently anywhere.

There are different models of Envoy that suit your needs and lifestyle. Of course, all models are equally good. However, I prefer the rare Corvette-engine Envoy SS for practicality and performance.

One of GMC Envoy’s features is the factory speaker system which may be a downgrade for some people. No worries though! You can rewire to enjoy better sound and great speaker options.

If you want to upscale a little more, there’s plenty of room for subwoofers and amplifiers, making your speaker system sound fantastic.

Harmony Audio R65 R46 OEM Factory Speaker Replacement Upgrade Package Compatible with GMC Envoy 1998 2001

In the article below, I will explain a few details about rewiring your Envoy’s speaker system.

How to Replace Your Envoy’s Factory Radio

First off, you’re going to need a few basic tools, which you probably already have in your garage, and of not, I added the below links to Amazon so you can order them conveniently.

Make a start at the center console that needs to be pulled back slightly. You can now open the console storage compartment to unscrew the Phillips screws from the top front edge. 

You’ll see the rubber coin cup in the rear of the compartment. Remove the two Phillips screws beneath it.

As you reach the bottom, pry up the screw cover, remove the two Phillips screws and lift the compartment. Next, pull the rubber liner out of the front drink cup holder to remove the screw. 

If you think everything is loosened up, you can now lift the rear of the console and pull it back slightly to make room to access the wiring behind the receiver.

After dealing with the console, removing the radio should be easy. All you have to do is remove some screws, pry away the trim panel carefully, disconnect the harnesses, and remove the radio.

Secure your new receiver to the mounting bracket and ensure it’s attached properly. Follow the instructions to make the necessary wiring. 

Once all the wirings are done, connect the receiver harness to the factory wiring harness. Plug the antenna into the back of the receiver and slide the entire assembly into the dash. Secure it in place using the three 7mm screws removed earlier. 

Now, test to see if it works! If it is, then put the dash and console together!

How to Rewire the Front Door Speakers in GMC Envoy?

The front speakers of Envoy are 4ohm 6-¾” and can be replaced with a variety of speakers.

However, you’re going to need mounting brackets to install smaller speakers in more extensive cavities, which are included in your speaker purchase.

Also, you need to remove the door panel to access the speakers. 

KnuKonceptz Kord Kable 12 Gauge Copper Speaker Wire - 50 Feet

For rewiring the front door speaker of your GMC Envoy, you’ll need the following tools:

  • Flat screwdriver
  • Socket, and ratchet
  • Putty knife

If you got all these tools, you are ready to start.

Remove the switch panel slowly using a screwdriver. When the switch panel is removed, disconnect the wires by slowly pulling the harnesses.

Remove all the bolts and connections inside to let lose the door panel. After removing every wiring, use the putty knife to push back in the door panel and pry it out slowly.

You can now remove the speaker from the three bolts that hold it. Next, remove the harness and the two clips behind the speaker to remove the entire part.

Line up your speaker and push it back into place. Then, put back the screws and tighten them up.

Reconnect the speaker harness and push back the harnesses to the hole. Next, lift the door panel into the window sill and once it’s all lined up, push it back into place.

Make sure to tighten the bolts that hold the door panel. 

Reconnect the harnesses to the door panel and push it back into its place. 

How to Rewire the Dash Speaker of your GMC Envoy?

If you’re thinking of installing your gear for your GMC Envoy, you should go for the system speakers with separate tweeters.

They’re ideal for someone who wants the best speaker system for their GMC Envoy and to experience the high sounds coming from the front of the car, and if an external amplifier powers the speakers, you have to run new wires.

Rewiring the dash speaker of your GMC Envoy is straightforward, and you can do it yourself using a few tools that you probably already have at home.

These are the steps to rewiring the dash speaker of your GMC Envoy:

  • Lift the hood and remove the negative battery cable using the wrench. Put away the cable and make sure it does not touch the positive wire.
  • Lift the parking brake lever. Use a trim panel removal tool to remove the panel at the bottom of the cupholder. There should be a screw beneath the panel, which you should remove using the Phillips screwdriver.
  • You can now open the center console storage compartment to remove the two screws on the forward-most edge of the compartment opening. Use the trim panel tool to pry up the rubber covering from the rear side of the compartment. Also, remove the two screws beneath the covering. Make sure to remove the rubber covering at the bottom of the center console covering and remove the screws beneath the covering.

SCOSCHE Install Centric Compatible with Select 2000-13 GM Vehicles Double DIN Complete Basic Installation Solution for Installing an Aftermarket Stereo ICGM8BN

  • You can now grab the center console to pull it away from the dashboard. There is a gap between the console and the dashboard, which allows you to remove the stereo bracket screws.
  • Use the screwdriver to remove the two screws on the other side of the lower dash panels. Take the panel away from the dashboard. 
  • Next, unscrew the base of the dash panel that surrounds the stereo and climate controls. Also, remove the screws at the corner of the stereo bracket and disconnect the stereo.
  • Your GMC Envoy’s dashboard is now ready for rewiring. Work your way to put back everything together with the new speaker system. 

How to Rewire Rear Door Speakers in GMC Envoy

Rewiring rear door speakers is also not too complicated, and it involves similar steps as replacing the wires in front speakers.

First, you have to remove the door panels. Be careful not to damage the plastic retaining clips.

When it comes to the speakers for the rear door, everything from 5-¼” to 6-¾” aftermarket speakers will fit in the Envoy, depending on the year and factory equipment.

From the tooling side, you will need only the basic equipment:

  • small flat blade
  • panel tool
  • ratchet and extension
  • screwdriver
  • pliers
  • Torx T15 

What to Remember When Rewiring the Speaker System of GMC Envoy?

The GMC Envoy’s stereo options are identical regardless of model and size. It ranges from the standard AM/FM/CD (or CD/cassette) receiver to the Bose® system. 

One thing to remember, when installing a new receiver, you might lose the factory nav and the satellite radio. However, you can retain OnStar if you have the correct adapter.

I recommend using a compatible adapter with your new stereo for easy rewiring. There are several adapters available on the market. Research before buying it!

A single-DIN (2″ tall) or double-DIN (4″ tall) will work in the Envoy.

Still, you’ll need to make room for the dash cavity by cutting out the plastic rear support. 

Although I am not a fan of the cutting dashboard, this operation is pretty easy as long as you have the small saw or the rotary tool for this procedure to be carried out successfully. 

Speaking of improving the speaker system of your Envoy, it has plenty of room for anything, including subwoofers.

Still, you’ll have a lot of space left for other stuff after adding the subwoofers. 

Also, it’s your call if you want to install a subwoofer box with great subs and amps. You have at least 45″ W x 14″ H x 34″ D in the trunk, and that’s still plenty of space for a subwoofer box.

Compatible with Chevy Trailblazer or GMC Envoy 2002-2009 Single 12" Subwoofer Sub Box Speaker Enclosure

There are plenty of subwoofers available in various sizes and deliver an impressive sound quality without taking up too much space. 

When do I need to Rewire the GMC Envoy Speakers?

There are various reasons why you might need to rewire your car’s speakers.

Deterioration of the speaker system is normal after years of usage. The connection between the wires and its terminal naturally wears down over time, creating poor sound quality for your car speaker.

Here are the standard steps to rewiring the speakers of your car:

Use the Removal Tool to Remove the Existing Car Stereo.

A stereo removal tool usually features two pry bars which you can insert to either side of the stereo to remove it.

Make sure to remove the trim panel around the stereo unit before sliding it out.

Identify the Speaker Wires

You can check the wiring diagram of the GMC Envoy online to help you identify the appropriate wires.

Once you have identified the wires, you can now strip off one inch of insulation on each wire using wire strippers. Make sure each wire is long enough to reach the location of the speakers.

Remove the Speakers

Remove the trim panel on the front bit of the speaker. You can use a pry tool to do this.

Connect the new wires to the speakers. Keep checking the wiring diagram of your Envoy’s speaker system to make sure the wiring is done appropriately. 

You can now enjoy better sound quality while listening to your Envoy’s car stereo. Plus, changing the speaker wires once in a while also extends the longevity of your car speaker.   


Rewiring anything seems like an exciting task, but it is time-consuming.

As you already know by now, rewiring the speaker system of an Envoy is relatively easy. With the right tools and some troubleshooting hacks, you can do it yourself.

Also, if you replace the stereo, make sure to use a suitable adapter. Otherwise, the radio may not be able to be installed or function properly.