Metra Electronics 40-GM20 Radio Antenna Adapter Fits Select 1988-2008 GM Vehicles
Condition: New
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Availability:
Only 7 left in stock, order soon!
Arrives
Saturday, Nov 14
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At a glance
- Condition
- New
- Size
- 1 Count (Pack of 1)
- Product Packaging
- Standard Packaging
- Model
- 40-GM20
- Dimensions
- 13.5 x 2 x 0.5 in
- Weight
- 18.14 g
- Color
- adapter
- Warranty
- Please contact the manufacturer
- Works with
- Vehicle Radio, Aftermarket Antenna
Features 4
- Antenna adapter cable
- Used to adapt the vehicles original factory radio to use with an aftermarket antenna
- Male Motorola connector on one end, Female Motorola connector on the other end
- Refer to the Metra Electronics Vehicle Fit Guide for fitment confirmation PRIOR to purchase
Description
If you are replacing the factory antenna in your vehicle, this antenna cable adapter ensures that you can continue to use your factory radio. It is a simple yet necessary cable that adapts the vehicle’s original mini “barbed” antenna connector of the factory radio with a male Motorola™ connector on one end and a female Motorola™ connector on the other.
Specs 16
| Connector Type | Coaxial |
|---|---|
| Color | adapter |
| Item dimensions L x W x H | 13.5 x 2 x 0.5 inches |
| Brand | Metra |
| Model Number | 40-GM20 |
| UPC | 086429007042 |
| Global Trade Identification Number | 42 |
| Manufacturer | Metra Electronics Corp |
| Built-In Media | See specs |
| Item Type Name | Metra Ltd Gm Radio Antenna With Mini Adapter |
| Mfr Part Number | 40-GM20 |
| Item Dimensions | 13.5 x 2 x 0.5 inches |
| Item Weight | 18.14 g |
| Package Quantity | 1 |
| Unit Count | 1 Count |
| Number of Items | 1 |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Nov 14
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Needed adapter
Size: 1 Count (Pack of 1)
Product Packaging: Standard Packaging
Great fit great quality
Reviewed in the United States on August 26, 2026 by Doug Scott
Worked on 2003 corvette radio
Size: 1 Count (Pack of 1)
Product Packaging: Standard Packaging
Used for adding an xm commander to my 2003 corvette. This is used to plug into the radio and other end (larger) to the commander. Good quality.
Reviewed in the United States on June 23, 2026 by Rita
Perfect fit!
Size: 1 Count (Pack of 1)
Product Packaging: Standard Packaging
Used on a 2003 Chevy s10. The antenna got stolen and they broke the housing. So after replacing the housing the antenna cable for the new antenna was too large even though it was the right part number. Used this to attach the antenna to the factory cable. Now my radio works again!
Reviewed in the United States on September 15, 2024 by Jacob L
Perfect fit.
Size: 1 Count (Pack of 1)
Product Packaging: Standard Packaging
This fit perfectly on my 1990 GMC K2500. My antenna cable end corroded off and I couldn't find a replacement cable with the small end, so I just stripped it back and shoved it in to this adapter and it works great!
Reviewed in the United States on February 26, 2025 by D. Barber
Works great
Size: 1 Count (Pack of 1)
Product Packaging: Standard Packaging
Exactly as described. It did the job well for my needs. Metra usually makes good products. This is one of them.
Reviewed in the United States on February 24, 2014 by John
Unhappy
Size: 1 Count (Pack of 1)
Product Packaging: Standard Packaging
I should have paid attention to an earlier review that said "I bought this adapter to use during an aftermarket radio install in my 2003 GMC Yukon. Based on Metra's website it looked like I could use a 40GM-20 or 40GM-10 adapter. Well it turns out the 40GM-20 does not work. This adapter is meant for aftermarket antenna coaxial cables. " It was correct and I had to go to a local stero store and buy the correct adapter. The desciption is misleading.
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Reviewed in the United States on October 17, 2014 by My Reviews
Fit my 2006 Chevy radio
Size: 1 Count (Pack of 1)
Product Packaging: Standard Packaging
I needed this to connect an XM adaptor, and it works fine.
Reviewed in the United States on February 13, 2025 by M
Exact fit at a fraction of the price
Size: 1 Count (Pack of 1)
Product Packaging: Standard Packaging
Fraction of the price as OEM. Works great.
Reviewed in the United States on January 11, 2025 by Regular