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Why This Tire?
Specifications
| Brand | Metra |
|---|---|
| Category | Tires |
| Manufacturer Part # | 40-GM21 |
| UPC | 086429007073 |
|---|---|
| Subcategory | Car Audio Installation |
| Weight | 0.5 lbs |
Vehicle Compatibility
| Year | Make | Model | Trim |
|---|
Product Description
The Metra GM Radio Antenna Adapter (40-GM21) is designed to connect an aftermarket radio to the factory antenna in various General Motors vehicles from 1988-2003. Metra is a leading manufacturer of car audio installation accessories, known for providing solutions that simplify aftermarket stereo upgrades. This adapter ensures proper signal transfer and a secure connection, allowing you to retain your vehicle's original antenna with a new head unit. It is an essential component for a clean and functional car audio installation.
Shipping & Returns
Fast Shipping
Standard delivery in 3-7 business days. Expedited options available.
30-Day Returns
Return unused items in original packaging for a full refund.
Questions & Answers
Check your vehicle owner's manual or the tire placard on the driver's side door jamb for the recommended tire size. You can also use our vehicle fitment tool at the top of the page to confirm compatibility. If you're unsure, our support team is happy to help you find the right fit.
We offer a 30-day return policy on unused, unmounted products in their original packaging. Simply contact our support team and we'll provide a prepaid return label. Refunds are processed within 5-7 business days of receiving the returned item. Mounted or used tires are not eligible for return.
We ship directly to your door or to your preferred local tire shop for installation. Most local tire shops offer mounting and balancing for $15-$25 per tire. Just provide your installer's address at checkout and we'll ship right to them.
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