1.888.955.6000
 
 
1-888-955-6000
crutchfield.com
Crutchfield

Metra 40-GM10 Antenna Adapter

Works with select 1985-up General Motors vehicles — Motorola male to female connector for factory antenna

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  • Metra 40-GM10 Antenna Adapter

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Metra 40-GM10 adapter

The Metra 40-GM10 adapter lets you connect an aftermarket receiver to the factory antenna cable. It has a male Motorola plug on one end and a female GM OEM jack on the other. If you're installing an FM modulator with your factory radio, you'll also need item 12040GM20. Please enter your vehicle information or call an Advisor at 1-888-955-6000 to find out if this adapter is compatible with your vehicle. Warranty: 60 days.

Note: Most vehicles will require additional installation parts — please identify your vehicle if you haven’t done so, then check here for a list of parts. You can also call an Advisor for more information.

 

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Product Research
What's in the box?

Download owner's manual

  • GM antenna adapter cable

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Features

Compatibility: The Metra AntennaWorks GM antenna adapter cable (40-GM10) converts the mini "barbed" or "barbless" plug of the factory antenna to a standard motorola connection for installation of an aftermarket car stereo head unit in select 1985 and later GM vehicles.

 
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Metra 40-GM10 Antenna Adapter Reviews

Average Customer Review:

484 people say:

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5 out of 5

No hassle

Written By Anonymous, Olympian wa on Tuesday, April 15, 2014
Crutchfield Customer Review (What's this?)
 
It's free with cd player purchase
Was this review helpful?    Yes | No
 
5 out of 5

simple!

Written By Mitch C., Mount Pleasant ,Tx on Sunday, April 13, 2014
Crutchfield Customer Review (What's this?)
 
Made it easy to adapt antenna.
Pros:
Simple install, quality product.
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By AliS, Logan, UT on Sunday, April 13, 2014
Crutchfield Customer Review (What's this?)
 
Works as needed, no complaints!
Was this review helpful?    Yes | No
 
5 out of 5

Perfect

Written By Joe W, Wilkes-Barre,PA on Thursday, April 10, 2014
Crutchfield Customer Review (What's this?)
 
works perfectly
Pros:
easy to install, saved space behind the radio
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

It works

Written By JYaz, Hanover, PA on Thursday, April 10, 2014
Crutchfield Customer Review (What's this?)
 
Does it's job
Pros:
It does what it's supposed to
Was this review helpful?    Yes | No
 
5 out of 5

Easy install

Written By Tad, Westlake, La on Wednesday, April 09, 2014
Crutchfield Customer Review (What's this?)
 
Easy install
Was this review helpful?    Yes | No
 
5 out of 5

Antenna adapter

Written By Antenna adapter, Canton, NC on Tuesday, April 08, 2014
Crutchfield Customer Review (What's this?)
 
Whats to review, You got to have it and it works.
Pros:
Works
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Mike, Lafayette, LA on Monday, April 07, 2014
Crutchfield Customer Review (What's this?)
 
Worked as expected
Pros:
Worked as expected
Was this review helpful?    Yes | No
 
4 out of 5

It wotks

Written By JLM, Jackson NJ on Sunday, April 06, 2014
Crutchfield Customer Review (What's this?)
 
Adapts well. I mean, what do you want it to do. Nice that it is included.
Pros:
Works
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Works good extending antenna

Written By Mike, Boise on Saturday, April 05, 2014
Crutchfield Customer Review (What's this?)
 
Not much to say, it works good and fits tight.
Pros:
Easy to install
Cons:
None really
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Anonymous, Utah on Saturday, April 05, 2014
Crutchfield Customer Review (What's this?)
 
Work well
Pros:
I didn't have to purchase anything additional for my install
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Anonymous, Little rock, ar on Friday, April 04, 2014
Crutchfield Customer Review (What's this?)
 
Great price
Pros:
It worked
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adaptor

Written By RichardH, Waldoboro, ME on Friday, April 04, 2014
Crutchfield Customer Review (What's this?)
 
This item does exactly what it is sopposed to. Like the angling for easier fit. Good quality.
Pros:
Good
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By LWard, Salem,AR on Thursday, April 03, 2014
Crutchfield Customer Review (What's this?)
 
Great Product
Pros:
Works good
Cons:
Non
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10

Written By ponyboy, mpls MN on Thursday, April 03, 2014
Crutchfield Customer Review (What's this?)
 
work great
Pros:
make install easy
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM Antenna Adapter

Written By Gary, Indiana on Wednesday, April 02, 2014
Crutchfield Customer Review (What's this?)
 
Quality adapter
Pros:
Works well and easy hook up.
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Jess, Massillon, Ohio on Wednesday, April 02, 2014
Crutchfield Customer Review (What's this?)
 
easy
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By BRUCE H., DARLINGTON,PA on Tuesday, April 01, 2014
Crutchfield Customer Review (What's this?)
 
WORKS GOOD
Pros:
WHAT CAN I SAY. YOU NEED IT FOR AFTERMARKET RADIOS
Cons:
NONE
Was this review helpful?    Yes | No
 
5 out of 5

Works Great!

Written By Alex, Davenport, IA on Saturday, March 29, 2014
Crutchfield Customer Review (What's this?)
 
The Metra 40-GM10 antenna adapter worked great in my 2009 Corvette. The only issue was that the attached wire was a little long, requiring careful placement of the antenna adapter so that it would not interfere with other wires or cause strain on the adapter. I ended up shoehorning it into the space to the right of the receiver where there was a little more room. Overall, it worked great, and the FM reception was vastly improved with my new radio.
Pros:
Works great, FM sensitivity is excellent with Alpine INA-W900BT
Cons:
Cable is a little long requiring careful placement of the adapter.
Was this review helpful?    Yes | No
 
5 out of 5

Works

Written By CCSmith, TN on Thursday, March 27, 2014
Crutchfield Customer Review (What's this?)
 
Easy to use.
Was this review helpful?    Yes | No
 
5 out of 5

GM antenna adapter

Written By Jack, Palos Verdes,CA on Wednesday, March 26, 2014
Crutchfield Customer Review (What's this?)
 
Works just like it should.
Pros:
perfect
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

Worked for me

Written By Bill, Sugar Grove, IL on Wednesday, March 26, 2014
Crutchfield Customer Review (What's this?)
 
It fit both the radio and the OEM antenna
Pros:
Worked for me
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Paul, Chesapeake, va on Sunday, March 23, 2014
Crutchfield Customer Review (What's this?)
 
Easy to use adapter to hook up aftermarket radios to stock applications.
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Anonymous, Loogootee, IN on Wednesday, March 19, 2014
Crutchfield Customer Review (What's this?)
 
Good product
Was this review helpful?    Yes | No
 
5 out of 5

Great Product

Written By MzLadyX, Spokane, WA on Monday, March 17, 2014
Crutchfield Customer Review (What's this?)
 
Works great with my CD Receiver.
Cons:
Did not receive it in the first shipment.
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Trent, Montana on Monday, March 17, 2014
Crutchfield Customer Review (What's this?)
 
Works just like it should
Was this review helpful?    Yes | No
 
4 out of 5

Metra 40-GM10 Antenna Adapter

Written By Jimmy, Texas on Saturday, March 15, 2014
Crutchfield Customer Review (What's this?)
 
easy to install
Was this review helpful?    Yes | No
 
5 out of 5

Great

Written By SteveY, Grand Rapids on Sunday, March 09, 2014
Crutchfield Customer Review (What's this?)
 
quick and easy to use
Pros:
heavy duty
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

antenna adapter

Written By in dash reciever kit, north branch ny on Friday, March 07, 2014
Crutchfield Customer Review (What's this?)
 
great
Pros:
installs easily neat
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

Antenna adapter

Written By Nelson1248, Albuquerque nm on Thursday, March 06, 2014
Crutchfield Customer Review (What's this?)
 
Works great
Pros:
Mills sound and perfect fit
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Does what it needs to do.

Written By Adam, Columbus, OH on Thursday, March 06, 2014
Crutchfield Customer Review (What's this?)
 
Does its job. No problems.
Was this review helpful?    Yes | No
 
5 out of 5

Works great

Written By AndrewD, NorCal on Monday, March 03, 2014
Crutchfield Customer Review (What's this?)
 
Fits perfectly on my 2005 Chevy Silverado - strong signal, no issues
Pros:
Works great. Fits perfectly
Was this review helpful?    Yes | No
 
5 out of 5

I love You Guys

Written By Michael W., verona pa on Monday, March 03, 2014
Crutchfield Customer Review (What's this?)
 
The best company on earth. I recieved my new stereo and installation parts on time and you guys made it simple and easy to install. Sounds beautifut I love it. I can't wait to order again. The other retailers have nothing on you guys. THANKS AGAIN!!!!!!?? I WILL SPREAD THE WORD
Pros:
EXcellent service , Great Quality, Great Customer Service. Ten STARS!!!!!!!. If anybody wants a Great service and products shop here cause you can't go wrong.
Cons:
NONE. How Could there be?
Was this review helpful?    Yes | No
 
5 out of 5

easy

Written By Mark, Wisconsin on Monday, March 03, 2014
Crutchfield Customer Review (What's this?)
 
does what it says
Cons:
that you need this part. radios should come with a standard size antenna jack.
Was this review helpful?    Yes | No
 
4 out of 5

Metra 40-GM10 Antenna Adapter

Written By dlb, st louis, mo on Sunday, March 02, 2014
Crutchfield Customer Review (What's this?)
 
good fit
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Anonymous, Fayetteville,TN on Saturday, March 01, 2014
Crutchfield Customer Review (What's this?)
 
the right part. works great picking up stations out of area that I could not pick up before.
Was this review helpful?    Yes | No
 
5 out of 5

Simple but makes install easier

Written By That one guy, Kansas on Friday, February 28, 2014
Crutchfield Customer Review (What's this?)
 
Not much to say, it's an antenna adapter. It does give you a little more length to work with, I would recommend getting one.
Was this review helpful?    Yes | No
 
5 out of 5

Adapter

Written By SlowRollinTurtle, Arkansas on Thursday, February 27, 2014
Crutchfield Customer Review (What's this?)
 
Does what it's suppose to
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By MattyLove, Hollandale, Mn on Wednesday, February 26, 2014
Crutchfield Customer Review (What's this?)
 
This antenna adapter is an excellent buy, giving the user the added length to hook up to short factory antenna attachments.
Was this review helpful?    Yes | No
 
5 out of 5

works great

Written By jimbo, Michie, TN on Tuesday, February 25, 2014
Crutchfield Customer Review (What's this?)
 
It's an antenna extension, and it's a good one.
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Sean P, Southern California on Saturday, February 22, 2014
Crutchfield Customer Review (What's this?)
 
Plug and play device
Was this review helpful?    Yes | No
 
5 out of 5

Great Free Items

Written By APandaGeek, Concord, CA on Thursday, February 20, 2014
Crutchfield Customer Review (What's this?)
 
Love getting the free installation kits with purchase and free shipping.
Pros:
Free.
Cons:
None.
Was this review helpful?    Yes | No
 
4 out of 5

Gotta have it

Written By Max, Upstate NY on Thursday, February 20, 2014
 
Thanks to GM, this product is necessary... No cost to me though thanks to Crutchfield. Not sure if it's the reason for terrible AM reception.
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Anonymous, Springfield Ohio on Thursday, February 20, 2014
Crutchfield Customer Review (What's this?)
 
Worked great
Was this review helpful?    Yes | No
 
5 out of 5

Antenna adapter

Written By Anonymous, Ohio on Wednesday, February 19, 2014
Crutchfield Customer Review (What's this?)
 
plug and play
Pros:
no brainer
Was this review helpful?    Yes | No
 
5 out of 5

antenna adapter

Written By royf, parkesburg,pa. on Monday, February 17, 2014
Crutchfield Customer Review (What's this?)
 
perfect fit
Was this review helpful?    Yes | No
 
5 out of 5

If you want an FM signal you have to have this.

Written By RSS, Benton,AR on Monday, February 17, 2014
Crutchfield Customer Review (What's this?)
 
Simple plug into the receiver and existing antenna cable. Most newer receivers require this or there will be no FM reception.
Pros:
Easy to install.
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

antenna adapter is a must have

Written By reloader760, san marcos, ca on Sunday, February 16, 2014
Crutchfield Customer Review (What's this?)
 
The factory plug is too short and will not fit the aftermarket deck. Get this adapter.
Pros:
Fits perfect and will make life and install easier.
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Crutchfield Customer Review, Hays County Texas on Saturday, February 15, 2014
Crutchfield Customer Review (What's this?)
 
works great
Pros:
Good reception
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Anonymous, deridder, louisiana on Tuesday, February 11, 2014
Crutchfield Customer Review (What's this?)
 
Fit perfect
Pros:
Fit perfect
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Perfect fit

Written By Mike G, Des Moines, IA on Thursday, February 06, 2014
Crutchfield Customer Review (What's this?)
 
Adapts the factory antennae on my 05 chevy Colorado for the after market head unit. Adapter connections are solid and have no worries of it coming loose in the dash.
Pros:
Works great and came as a freeby with my purchase of the head unit
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Anonymous, Centerport ny 11721 on Wednesday, February 05, 2014
Crutchfield Customer Review (What's this?)
 
Excellent product
Pros:
A perfect product for new radios
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Item for another vehicle

Written By Luvmychi3, Wisconsin on Tuesday, February 04, 2014
Crutchfield Customer Review (What's this?)
 
Works Great!
Was this review helpful?    Yes | No
 
5 out of 5

Worked great

Written By Lox4rox, Texas on Sunday, February 02, 2014
Crutchfield Customer Review (What's this?)
 
Perfect fit, 10 second conversion for GM antenna to retain stock antenna with aftermarket head unit.
Pros:
Easy, perfect fit
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Good Antenna Adapter

Written By BrianH, Antioch, TN on Sunday, February 02, 2014
Crutchfield Customer Review (What's this?)
 
Good quality adapter. Made installing a new stereo in wife's truck a breeze. Long enough that it doesn't stretch the original antenna cable.
Pros:
Economical, sturdy and good quality
Cons:
None that I experienced
Was this review helpful?    Yes | No
 
5 out of 5

Perfect fit

Written By Todd, Texas on Wednesday, January 29, 2014
Crutchfield Customer Review (What's this?)
 
Perfect fit,
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Arnie L, Croydon Pa on Wednesday, January 22, 2014
Crutchfield Customer Review (What's this?)
 
Great fit made it easy to fit the new radio to the old anttenna
Was this review helpful?    Yes | No
 
5 out of 5

No brainer

Written By PaulC, Kerhonkson, NY on Wednesday, January 22, 2014
Crutchfield Customer Review (What's this?)
 
works as it should, without it you are SOL
Was this review helpful?    Yes | No
 
5 out of 5

2003 Silvarado

Written By D.S., SoCal on Monday, January 20, 2014
Crutchfield Customer Review (What's this?)
 
What can I say? It works!
Was this review helpful?    Yes | No
 
4 out of 5

good antenna

Written By dom, kingston, ny on Wednesday, January 15, 2014
Crutchfield Customer Review (What's this?)
 
good antenna, does what its supposed to
Pros:
does what it's supposed to.
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

It Fits

Written By Dave R, Delran, NJ on Tuesday, January 14, 2014
Crutchfield Customer Review (What's this?)
 
Perfect Fit - not much more to say.
Was this review helpful?    Yes | No
 
4 out of 5

Fast

Written By Amdahl, SD on Tuesday, January 14, 2014
Crutchfield Customer Review (What's this?)
 
Got the job done.
Pros:
Two plugs and your done.
Cons:
Its alot longer than it needs to be they should shorten it up so there is a lot clutter.
Was this review helpful?    Yes | No
 
5 out of 5

Free and simple to use

Written By Bill S, Albuquerque, NM on Monday, January 13, 2014
Crutchfield Customer Review (What's this?)
 
Clean and simple to use.
Pros:
clean and simple
Cons:
none I found
Was this review helpful?    Yes | No
 
5 out of 5

You need this to connect your antenna

Written By SiddR, Temecula, CA on Monday, January 13, 2014
Crutchfield Customer Review (What's this?)
 
You need this part to connect the factory antenna. It connected easily and it's a good fit.
Was this review helpful?    Yes | No
 
5 out of 5

Easy use

Written By Terry, Ashland, KY on Monday, January 13, 2014
Crutchfield Customer Review (What's this?)
 
Does exactly what it is supposed to do.
Was this review helpful?    Yes | No
 
5 out of 5

VERY HELPFUL

Written By Vcpbp101, San Antonio, TX on Thursday, January 09, 2014
 
Adapter helped in the overall installation, making it simple and easy. This adapter was definitely needed for my chevy colorado.
Pros:
Fit Perfectly
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

I could have used this

Written By Mr B-5, Pine Hill AL on Tuesday, January 07, 2014
Crutchfield Customer Review (What's this?)
 
I didnt need this but i kept it because i might need it in the future
Pros:
Its a backup plan for me.
Cons:
I dont know of any at this time
Was this review helpful?    Yes | No
 
5 out of 5

Perfect Fit

Written By DonH, Clarksville TN on Monday, January 06, 2014
Crutchfield Customer Review (What's this?)
 
Fit perfectly from standard plug on my 2005 Silverado to the new JVC stereo I added
Pros:
fits
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

Simple and works

Written By Dan, Centeral IL on Friday, January 03, 2014
Crutchfield Customer Review (What's this?)
 
What can I say beyond that it works.
Pros:
Works as intended.
Cons:
Maybe it could be shorter?
Was this review helpful?    Yes | No
 
5 out of 5

Works as described

Written By Steve KY, Ashland KY on Friday, January 03, 2014
Crutchfield Customer Review (What's this?)
 
Works as needed
Pros:
Works
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Not needed

Written By a w, Garden City, KS on Thursday, January 02, 2014
Crutchfield Customer Review (What's this?)
 
This was not needed as one came with the steering wheel controller.
Was this review helpful?    Yes | No
 
5 out of 5

Simple solution

Written By JET, Fort Myers, FL on Wednesday, January 01, 2014
Crutchfield Customer Review (What's this?)
 
A simple solution for a simple problem. Plug and play and works as advertised.
Pros:
Easy to install
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Antenna Adapter

Written By Mike, Atlanta, GA on Monday, December 30, 2013
Crutchfield Customer Review (What's this?)
 
Worked Perfect.
Pros:
Worked Perfect.
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Anonymous, Maricopa, AZ on Monday, December 30, 2013
Crutchfield Customer Review (What's this?)
 
Very pleased with this product.
Was this review helpful?    Yes | No
 
5 out of 5

Handy hook-up

Written By w.weeks, Oakland, MD on Friday, December 27, 2013
Crutchfield Customer Review (What's this?)
 
This is needed to convert your Chevrolet antenna to the bigger opening in the aftermarket audio system.
Pros:
It works.
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

yup, it fit

Written By rc5695, upstate, sc on Friday, December 27, 2013
Crutchfield Customer Review (What's this?)
 
It fit, what more can I say?
Pros:
perfect fit
Was this review helpful?    Yes | No
 
5 out of 5

antenna adapter

Written By nickann, moravian falls nc on Thursday, December 26, 2013
Crutchfield Customer Review (What's this?)
 
got the antenna adapter about 3 days after ordering took straight out of package and hooked it up in less than a min. works great gets great reception
Pros:
easy to put on works great great quality
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Anonymous, Tampa, FL on Friday, December 20, 2013
Crutchfield Customer Review (What's this?)
 
Worked perfectly, as advertised!
Was this review helpful?    Yes | No
 
5 out of 5

Necessary

Written By MBR, Albuquerque, NM on Friday, December 20, 2013
Crutchfield Customer Review (What's this?)
 
Amazing that GM would reinvent the antenna connector, but this adapter fixes that problem.
Pros:
Angled connector helps with tight fitting receiver.
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Perfect

Written By EA, El Segundo CA on Thursday, December 19, 2013
Crutchfield Customer Review (What's this?)
 
Perfect
Pros:
Great signal, fits great
Cons:
None
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By Tastro, Norman, OK on Monday, December 16, 2013
Crutchfield Customer Review (What's this?)
 
Worked great. EZ to use.
Pros:
EZ to use, nice fit
Cons:
none
Was this review helpful?    Yes | No
 
5 out of 5

does what it should

Written By Gary, Cincinnati, OH on Monday, December 16, 2013
Crutchfield Customer Review (What's this?)
 
Does what it should
Was this review helpful?    Yes | No
 
5 out of 5

Metra 40-GM10 Antenna Adapter

Written By