This aftermarket antenna adapter is designed for use with most 1988-2006 GM vehicles and features copper, polypropylene and steel materials for durability.
Q: What is this antenna adapter made of?
A: This antenna adapter is made of durable copper, polypropylene and steel materials.
Q: How does this antenna adapter connect?
A: This antenna adapter has a mini barbed connector for easy installation.
Q: What is the quantity of antenna adapters included?
A: This product includes one antenna adapter.
Q: Is this antenna adapter available in all Best Buy stores?
A: This antenna adapter is part of the expanded online assortment and may not be available in all Best Buy stores.
Q: What vehicles are compatible with this antenna adapter?
A: This antenna adapter is compatible with most 1988-2006 GM vehicles.
Q: Will this work on a 2006 Pontiac Grand Prix Base?
A: undefined
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This aftermarket antenna adapter is designed for use with most 1988-2006 GM vehicles and features copper, polypropylene and steel materials for durability.

This Metra 40-GM21 adapter lets you connect an aftermarket antenna to your compatible 1998-2008 GM vehicle's factory-installed radio. Copper, polypropylene and steel materials and copper shielding provide durability.

This adapter allows you to adapt an aftermarket antenna to your OEM radio in select 1988 - 2006 GM vehicles.

Listen to your favorite AM or FM radio stations on an aftermarket radio with this Metra factory BY-ADGM antenna adapter. The high-quality design plugs into your OEM antenna harness for a seamless connection with the aftermarket radio harness. This Metra factory antenna adapter features a universal construction for smooth installation on most 1983-2013 GM vehicles.
| Pros for Metra - Antenna Adapter Reverse for Select 1988-2011 Toyota Chevrolet Cadillac Pontiac Hummer - Black | |||
|---|---|---|---|
| There were no pros for this product— | Compatibility, Fit, Installation, Antenna Adapter, Price | Installation, Compatibility, Fit, Reception, Ease of use | Performance |
| Cons for Metra - Antenna Adapter Reverse for Select 1988-2011 Toyota Chevrolet Cadillac Pontiac Hummer - Black | |||
| There were no cons for this product— | There were no cons for this product— | Static, Signal | There were no cons for this product— |
