# Harmony Audio HA-40GM10 Compatible with Cadillac DeVille 2000-2005 Factory Radio to Aftermarket Antenna Adapter, 95-2005B Double DIN Installation Dash Kit and GMOS-06 GM OnStar Interface Harness — resale value

Source: JunkPal price guide — https://junkpal.ai/products/harmony-audio-ha-40gm10-compatible-with-cadillac-deville-2000-2005-fac-b01ac7amt4

**Harmony Audio HA-40GM10 Compatible with Cadillac DeVille 2000-2005 Factory Radio to Aftermarket Antenna Adapter, 95-2005B Double DIN Installation Dash Kit and GMOS-06 GM OnStar Interface Harness** sells for about **$129.95** new or sealed, based on real closed eBay sales.

Live listings and the full sold-price history are on the page: https://junkpal.ai/products/harmony-audio-ha-40gm10-compatible-with-cadillac-deville-2000-2005-fac-b01ac7amt4

## Value

| Condition | Value (USD) |
| --- | --- |
| New / Sealed | $129.95 |

Values are medians of real closed eBay sales, updated 2026-07-22. They are estimates for reference, not offers or appraisals — condition, completeness and edition move them a lot, so compare against the sold listings before pricing anything.

## Check the market

- [Sold listings on eBay](https://junkpal.ai/api/go?to=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DHarmony%2520Audio%2520HA-40GM10%2520Cadillac%2520DeVille%2520antenna%2520adapter%26LH_Sold%3D1%26LH_Complete%3D1%26mkcid%3D1%26mkrid%3D711-53200-19255-0%26siteid%3D0%26campid%3D5339166094%26toolid%3D10001%26mkevt%3D1%26customid%3Dmd-sold&p=md-sold) — the closed sales these medians are computed from
- [Live listings on eBay](https://junkpal.ai/api/go?to=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DHarmony%2520Audio%2520HA-40GM10%2520Cadillac%2520DeVille%2520antenna%2520adapter%26mkcid%3D1%26mkrid%3D711-53200-19255-0%26siteid%3D0%26campid%3D5339166094%26toolid%3D10001%26mkevt%3D1%26customid%3Dmd-live&p=md-live) — what sellers are asking right now

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## Details

| Field | Value |
| --- | --- |
| Brand | Harmony Audio |
| Category | Electronics |

## About

This product is a comprehensive installation kit for vehicle audio upgrades, specifically the Harmony Audio HA-40GM10. It functions as a compatible adapter for Cadillac DeVille 2000-2005 factory radios, including a Double DIN Installation Dash Kit and a GMOS-06 GM OnStar Interface Harness.

This kit is sought by individuals upgrading factory audio systems in compatible Cadillac DeVille models.

Resale value is influenced by the condition of the kit components and whether all parts, such as the antenna adapter and interface harness, are complete.

## FAQ

**What vehicles is this adapter kit compatible with?**

This kit is compatible with Cadillac DeVille models manufactured between 2000 and 2005.

**What does the HA-40GM10 kit include?**

It includes the HA-40GM10 adapter, a Double DIN Installation Dash Kit, and the GMOS-06 GM OnStar Interface Harness.

**What affects the resale value of this kit?**

The condition of the components and the completeness of the entire kit drive its resale value.

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Full price guide: https://junkpal.ai/products/harmony-audio-ha-40gm10-compatible-with-cadillac-deville-2000-2005-fac-b01ac7amt4
How these values are computed: https://junkpal.ai/methodology
Cite as: "JunkPal price guide value as of 2026-07-22, based on real sold listings (junkpal.ai)"