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2005-2010 Pontiac G6

2005 • 2006 • 2007 • 2008 • 2009 • 2010

Pontiac G6 convertible

Pontiac G6 convertible (Crutchfield Research Photo)

Pontiac G6 sedan

Pontiac G6 sedan (Crutchfield Research Photo)

Pontiac G6 coupe

Pontiac G6 coupe (Crutchfield Research Photo)


Pontiac is gone, but its memory lives on in the Firebirds burning rubber at stoplights, the GTOs selling for crazy money during televised car auctions, and, yes, in the G6s that you see tooling around town every day. The G6 isn't a "classic" Pontiac (yet, anyway), but as a parting shot, the grand old brand (est. 1926) could have done a lot worse.

Based on the same platform that underpins the Chevy Malibu Maxx, among other GM products, the G6 is a long, sleek car that, in an interesting flashback to an earlier era of automotive marketing, is available in a variety of body styles and trim levels. From a 4-cylinder base sedan to the performance-oriented GTP coupes and convertibles, the G6 range offers something for nearly everyone. And, thanks to unwarranted worries about "orphan brand syndrome," prices can be quite reasonable.

Pay no attention to the "orphan car" nonsense. It's a Pontiac, not a Peugeot, so parts and/or knowledgeable mechanics should be available until 2073 or so. If you're thinking about installing a new stereo, Crutchfield has the gear  you'll need to keep your G6 rocking for years to come.

Factory system

The standard G6 system consisted of an in-dash AM/FM/CD single-disc player with six speakers. XM satellite radio and an MP3 player were added to the package later on. The premium system used the same radio with an 8-speaker Monsoon system. The G6's Driver Information Center was built into the radio, which means you'll need adapters that will allow you to retain that function and others (more details below).

Pontiac G6 dashboard

Getting to the G6's radio takes a bit of work (Crutchfield Research Photo)

Replacing your factory radio

Thanks to the G6's marvelously well-integrated dashboard design, getting to the factory receiver is a rather indirect procedure. Your Crutchfield MasterSheet™, which is included with your stereo purchase, contains illustrated, step-by-step instructions to guide you through the process. The job isn't terribly difficult, but you will wind up removing a fair number of plastic panels around the radio before you get to the radio itself. Be patient, take good care of the plastic bits, and be sure to store them safely until you're ready to put them back in the car.

Pontiac G6 radio

This night view shows the Driver Info Center (Crutchfield Research Photo)

Once you reach the G6's radio cavity, there's plenty of space in the cavity for either a single- or double-DIN receiver. A wide variety of receivers will fit, but there are some things to consider while you're deciding which one to buy.

You'll lose your factory XM satellite radio (if equipped) when you replace the factory radio, but that's easy to remedy with the right aftermarket equipment. If you choose a double-DIN receiver, though, you'll lose the G6's "Driver Information Center" (seen at right), which is housed in the factory radio.

If you want to retain that functionality, you'll need to purchase a single-DIN receiver and a special OEM integration kit that includes a trim kit and a wiring harness for the new receiver. It replaces the "DIC" and lets you make all the adjustments you'd normally make through your factory radio, like oil reminder, factory alarm settings, etc. This integration kit also retains the factory OnStar® features.

The warning chimes and audible turn signals are built into the factory radio unit. Whether you have the standard system or the Monsoon system, you'll need to purchase an adapter to retain the warning chimes. The adapter will keep the audible safety warnings functioning properly, while also providing a switched 12-volt power source for your new radio. Depending on the adapter, it might even integrate the steering wheel audio controls. The specific adapters available depend on how your G6 is equipped. Crutchfield strongly recommends that you use one of these adapters, and to help out, we'll give you a very nice discount on the adapter's price when you buy it along with your new stereo.

Tools needed: Panel tool, 7mm socket, ratchet and extension,

Steering wheel audio controls

If you want to continue using the steering wheel controls on your G6, you'll need an adapter. The one you need depends on the integration adapter you'll be using to install your stereo. If you are NOT retaining the Driver Info Center (which means you're using a PAC adapter), then you should get the SWI-RC steering wheel adapter. If you're using the Metra adapter to retain the Driver Info Center, we suggest the ASWC-1 from Axxess. A Crutchfield Advisor can assist you in ordering all the equipment you need.

Shop for car stereos that fit your Pontiac G6

Replacing your factory speakers

Installing anew set of speakers in the G6 isn't without challenges, but it's not the toughest DIY task ever by far. The results, of course, will be totally worth the effort.

Front speakers

Whether your G6 has two doors or four, the procedures and possibilities for installing front door speakers are quite similar. You'll need to remove the door panels, which, despite a couple of interesting nuances covered in your Crutchfield MasterSheet™, is relatively uncomplicated. Once you're in, you'll find either a 6-1/2" or 6-3/4" woofer at the base of the door and a set of tweeters up high. A set of aftermarket component speakers would be ideal for any G6 model.

Pontiac G6 front door

The G6 convertible's front door (Crutchfield Research Photo)

To remove the lower speakers, start by removing the four Phillips or Torx T15 screws (we've seen both) securing the factory speaker. Pull the speaker out, disconnect it, and remove it. At this time, there isn't a speaker wiring harness available for this location, so you'll have to cut off the factory connectors and splice the vehicle's speaker wires to your new speaker wires. An easier option is to use a set of Posi-Tap connectors to tap into the speaker wires without cutting off the connectors.

On the G6 sedan, the tweeters are mounted in the sail panels. On the coupe and convertible, they're mounted on the inside of the door panels (as shown above). Either way, the 1-3/8" diameter factory models are easy to reach and easy to remove. A pair of universal backstraps will make it easier to secure the new tweeters.

Tools needed: Panel tool, Phillips screwdriver, flat-blade screwdriver, Torx T15 and T30 drivers

Note: Some convertible models include for a mid-range speaker. We have not researched this location at this time, but we welcome your input and, if possible, photos.

Rear speakers
Pontiac G6 rear deck speakers

Pontiac G6 rear deck speakers (Crutchfield Research Photo)

The degree of difficulty involved in replacing the rear speakers on the G6 depends entirely on the type of G6 you're working with. The convertible is relatively easy, but the sedan and coupe involve varying (but similar) amounts of rear seat and trim removal. It's not hard, but it is labor-intensive, so make sure you've cleared out plenty of time for the job. Your Crutchfield MasterSheet contains illustrated instructions for all three models.  

On Monsoon-equipped sedans and coupes, the amp sends bass and treble frequencies to the speakers through separate sets of wires. To get full-range sound, you'll need to install an aftermarket stereo and bypass the factory amp, which is located in the right rear of the trunk.


The sedan, regardless of system, was equipped with 6"x9" rear deck speakers, which can be replaced by same-size aftermarket models or, with the help of the discounted brackets available with your Crutchfield speaker purchase, 5-1/4" or 6-12" models. A wiring harness is available for vehicles equipped with the standard stereo, but you'll need to splice the wiring or use a set of Posi-Products connectors to hook everything up in a Monsoon-equipped car.

Pontiac G6 coupe rear deck

If your G6 has a roof, the rear speakers are in the rear deck. This is the coupe. (Crutchfield Research Photo)


On the G6 coupe, the rear deck speaker replacement process is bit more involved, but not unbearably so. Your MasterSheet explains the ins and outs of getting your old speakers out and your new ones in.

A variety of 5-1/4", 6-1/2", or 6"x9" speakers will fit in the rear deck of Monsoon-equipped coupes, but you'll need to splice the wires or use connectors when you install the aftermarket models.

We have not yet researched a coupe equipped with the standard system. Based on the sedan, however, we're confident that a variety of 5-1/4", 6-1/2" or 6"x9" speakers will fit.


Your G6 convertible (technically, a retractable hardtop) has a pair of rear speakers located behind grilles in the rear seat side panels. They're pretty easy to get to, and they can be replaced with a number of 6-3/4", 5-1/4", or 6-1/2" speakers. G6 convertibles have the Monsoon system, but unlike the sedan and coupe, these speakers are not bi-amped, so you won't have to replace the radio or bypass the factory amplifier.

Pontiac G6 convertible speakers

On the G6 convertible, the speakers are in the rear side panels (Crutchfield Research Photo)

To remove them, start on the sides and pry out the edges of the speaker grille panel to release the retaining clips. Flex the panel in the middle to clear the clips on the top and bottom as you remove it.

Remove the four Phillips screws securing the speaker, pull it out and disconnect the wiring plug. Again, you'll need to splice the wiring or use a set of connectors.

A speaker adapter bracket is available at a discount with your order. Depending on the speaker you're installing, you may need to modify this bracket by grinding off some material with a rotary tool.

Tools needed (depending on body style): Panel tool, Phillips screwdriver, flat-blade screwdriver, ratchet and extension, and 1/4", 7mm, 13mm, and/or 18mm sockets

Shop for speakers that fit your Pontiac G6

Bass in your G6

The G6 sedans and coupes offer a healthy amount of trunk space. The sedan's trunk offers 40" W x 13" H x 34"/38" D of space for a subwoofer box, while the coupe gives you a similar amount of space. That's plenty of room for an amplifier and a subwoofer box.

Pontiac G6 sedan trunk

The G6 sedan has plenty of trunk space for your subwoofers; the convertible (shown) does not (Crutchfield Research Photo)

The convertible is a different story. That retractable hardtop has to go somewhere, and that somewhere is the trunk. Measured below the top's safety cover, there's a mere 39" W x 5" H x 11"/11" D of room back there. Thankfully, there are some compact powered subs to choose from, so you'll be able to add powerful bass to your G6 convertible.

Shop for vehicle-specific subwoofers for your Pontiac G6

Other options

Here are some other suggestions on ways to improve your G6:

iPod® and satellite radio adapters

If you don't want to replace the factory receiver, you can still add versatility and great sound to the system. We offer several adapters that will allow you to use an iPod, MP3 player, or satellite radio with the factory radio.


With its long wheelbase and slippery body, the G6 is reasonably quiet as it is. But if you really want to get the best performance out of your stereo, you should consider a Dynamat 10435 Xtreme Door Kit. This heavy-duty insulating material is easy to install, and it really makes a difference. One kit should take care of a 2-door G6 or the front doors on a sedan. If you install an aftermarket subwoofer, you might want to line the trunk lid as well.

Car security

We recommend using the FLCAN module for Passlock and factory security integration when installing any of the remote start or security systems we carry.  Most connections are done at the ignition switch, but there are also connections at the OBD II port, and in the center console. A Crutchfield Advisor can assist you in ordering all the equipment you need. If you don't have car audio installation experience, you should consider having this job done by a professional.

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