GM 1988-2005 (20-pin, fully terminated) — 70-1858-1
Key features
- For select GM 1988-2005 (20-pin, fully terminated)
- Plugs into the car's original radio connectors on one side
- 20-pin, fully terminated wiring harness for fast and easy radio installation
- No wire cutting needed for factory radio connectors
- Includes additional 6 pin section – fully terminated
- Color-coded wires on the other side are connected to the aftermarket radio
GM 1988-2005 (20-pin, fully terminated) — 70-1858-1 is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
Connect an aftermarket radio to a compatible GM vehicle using the 70-1858-1 wiring harness. Its 20-pin, fully terminated vehicle connector and color-coded radio wires help simplify the installation without cutting the factory radio connectors.
Key Features & Benefits
- 20-pin vehicle connector: Plugs into the original radio connectors for a direct connection at the factory harness.
- Color-coded radio wires: Connect or solder these wires to the aftermarket radio.
- Four-speaker connection: Provides electrical power to the radio for a four-speaker connection.
- Fully terminated 6-pin section: Includes an additional section for the installation.
- Installation help: A tech support number is available seven days a week.
Technical Specifications
| Product | Wiring harness |
|---|---|
| Model | 70-1858-1 |
| Vehicle application | GM 1988-2005 |
| Vehicle-side connector | 20-pin, fully terminated |
| Radio-side wires | Color-coded; connect or solder to the aftermarket radio |
| Speaker connection | Four-speaker connection |
| Additional section | 6 pin, fully terminated |
Why Choose This Product?
This harness connects to the vehicle’s original radio connectors, so you do not need to cut those factory connectors to make the connection. The color-coded wires provide the connection point for an aftermarket radio, while the included 6-pin section is part of the harness.
It is intended for radio installations in the GM 1988-2005 application stated above. Confirm your exact vehicle’s requirements before planning the installation.
Installation & Compatibility Notes
Connect or solder the color-coded wires to the aftermarket radio. The harness plugs into the vehicle’s original radio connectors without cutting those connectors.
A dash kit, antenna adapter, or special interface adapter may also be needed, depending on the vehicle and installation. A special interface may be required to retain steering-wheel audio controls or functions such as navigation or video. Check your vehicle’s requirements before purchase.
Frequently Asked Questions
Which vehicles is the 70-1858-1 listed for?
It is listed for GM vehicles from 1988-2005. Check your exact vehicle’s radio connections and installation requirements.
Does this harness require cutting the factory radio connectors?
No. The vehicle-side adapter plugs into the original radio connectors without cutting them. The color-coded wires connect or solder to the aftermarket radio.
What speaker connection does it provide?
It provides electrical power to the radio for a four-speaker connection.
Will I need other parts for my installation?
Possibly. Depending on your vehicle, installation may require a dash kit, antenna adapter, or special interface adapter.
Can it retain steering-wheel audio controls?
A special interface adapter may be needed, depending on your vehicle. Check your vehicle’s requirements for the appropriate interface.
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