Description
Match the fully terminated GM radio connector
Metra 70-1858-1 Fully Terminated 20-Pin Radio Harness with 6-Pin Section for Select GM 1988–2005
A 20-pin radio wiring harness with an additional fully terminated 6-pin section and color-coded receiver leads.
Overview
The Metra 70-1858-1 provides a fully terminated 20-pin radio connector and an additional fully terminated 6-pin section for supported GM installations within the 1988–2005 application range. The vehicle end plugs into the matching original radio connector, while color-coded leads connect or solder to the replacement receiver. It provides radio power and a four-speaker connection while preserving the original connector.
Verify the exact vehicle connector before ordering
This is a connection-specific harness for select GM applications within 1988–2005. A model-by-model application list is unavailable for this exact variant. Confirm the original radio plug, the 20-pin configuration and the additional 6-pin section before ordering. A dash kit, antenna adapter or separate factory-function interface may also be needed.
| Model | 70-1858-1 |
| Type | Radio wiring harness |
| Main connection | 20-pin, fully terminated |
| Additional section | 6-pin, fully terminated |
| Receiver side | Color-coded wire leads to connect or solder |
| Electrical function | Radio power and four-speaker connection |
| Application scope | Select GM 1988–2005 with matching factory connector |
Application scope
A model-by-model application list is unavailable for this exact harness. The GM 1988–2005 range is not a guarantee for every model. Verify both connector sections and any separate installation or factory-function interface requirements.
A model-by-model application list is unavailable for this exact harness. The GM 1988–2005 range is not a guarantee for every model. Verify both connector sections and any separate installation or factory-function interface requirements.