Introducción
This manual provides comprehensive instructions for the proper installation and use of the Metra 70-2001 Radio Wiring Harness. This harness is specifically designed to facilitate the installation of an aftermarket car stereo into compatible General Motors vehicles, ensuring a secure and reliable electrical connection without cutting factory wiring.
Información de seguridad
- Desconecte siempre el terminal negativo de la batería del vehículo antes de comenzar cualquier instalación eléctrica para evitar cortocircuitos y descargas eléctricas.
- Ensure all wiring connections are secure and properly insulated using electrical tape, crimp connectors, or heat shrink tubing. Loose connections can lead to electrical malfunctions or fire hazards.
- Consulte con un técnico automotriz profesional si no está seguro acerca de alguna parte del proceso de instalación.
- Do not modify the wiring harness. Any alterations may void the product warranty and could cause damage to your vehicle's electrical system.
- Utilice equipo de protección personal adecuado, como gafas de seguridad, durante la instalación.
Compatibilidad del vehículo
The Metra 70-2001 Radio Wiring Harness is compatible with select General Motors vehicles manufactured between 1994 and 2004. This includes various models from Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac within this year range.
Importante: Always verify that your vehicle's factory wiring harness connector physically matches the Metra 70-2001 connector before proceeding with installation. Vehicle models and trim levels can vary, and some vehicles within the specified range may use a different connector.
Contenido del paquete
Al abrir el paquete, asegúrese de que todos los componentes estén presentes y sin daños:
- Metra 70-2001 Radio Wiring Harness (GM 32-Pin Connector)

Image: The Metra 70-2001 Radio Wiring Harness shown in its retail packaging, indicating the product model and compatibility.
Instrucciones de instalación (configuración)
Herramientas necesarias
- Pelacables
- Engarzadores de alambre
- Cinta aislante o tubo termorretráctil
- Multímetro (opcional, para verificar conexiones)
- Panel Removal Tools (for vehicle interior trim)
Pasos previos a la instalación
- Desconecte la batería: Locate your vehicle's battery and disconnect the negative (-) terminal to prevent electrical hazards.
- Quitar la radio de fábrica: Carefully remove the factory radio from the dashboard. This typically involves removing trim panels and unscrewing the radio unit.
- Identificar el arnés de fábrica: Locate the factory wiring harness that was connected to the original radio.
Conexiones de cableado
The Metra 70-2001 harness is designed to connect directly to your aftermarket radio's wiring. Match the wires from your aftermarket radio to the corresponding wires on the Metra 70-2001 harness. Refer to the wiring diagram section below for standard color codes. Ensure each connection is secure and properly insulated.

Image: The Metra 70-2001 Radio Wiring Harness showing the multi-colored wires ready for connection to an aftermarket radio.
Pasos finales
- Conectar el arnés: Plug the Metra 70-2001 harness into the vehicle's factory radio connector.
- Funcionalidad de prueba: Reconnect the vehicle's negative battery terminal. Turn on the ignition and test the aftermarket radio's power, sound, and other functions.
- Asegurar y volver a ensamblar: Once confirmed working, carefully tuck away excess wiring, mount the aftermarket radio, and reassemble any removed dashboard trim panels.
Diagrama de cableado
The following table outlines the standard wire color codes for the Metra 70-2001 harness. It is crucial to cross-reference these with the wiring diagram provided with your specific aftermarket radio, as color codes can vary between manufacturers.

Imagen: Un detalle view of the 32-pin connector on the Metra 70-2001 harness, showing the pin configuration.
| Color del cable | Función |
|---|---|
| Amarillo | Potencia constante de 12 V |
| Rojo | Alimentación de accesorios de 12 V |
| Negro | Suelo |
| Naranja | Iluminación |
| Azul | Antena de poder / Ampencendido del lificador |
| Blanco | Altavoz delantero izquierdo (+) |
| Blanco/negro | Altavoz frontal izquierdo (-) |
| Gris | Altavoz delantero derecho (+) |
| Gris/Negro | Altavoz delantero derecho (-) |
| Verde | Altavoz trasero izquierdo (+) |
| Verde/negro | Altavoz trasero izquierdo (-) |
| Púrpura | Altavoz trasero derecho (+) |
| Púrpura/negro | Altavoz trasero derecho (-) |
Operación
Once correctly installed, the Metra 70-2001 Radio Wiring Harness functions as a direct interface between your aftermarket radio and the vehicle's existing electrical system. It provides the necessary power, ground, accessory, and speaker connections, allowing your new radio to operate as intended, delivering audio to the vehicle's speakers and receiving power from the ignition and constant battery sources.
Mantenimiento
The Metra 70-2001 Radio Wiring Harness is a passive electrical component and requires no routine maintenance. It is designed for a long service life once properly installed. Periodically, if you experience audio issues, you may check the harness connections to ensure they remain secure and free from corrosion or damage.
Solución de problemas
- No hay energía en la radio:
- Revise la caja de fusibles del vehículo para ver si hay fusibles quemados relacionados con la radio o la alimentación de accesorios.
- Ensure the yellow (constant power) and red (accessory power) wires are correctly connected and receiving voltage.
- Verify the black (ground) wire has a solid connection to chassis ground.
- No hay sonido en los altavoces:
- Confirm all speaker wires (white, gray, green, purple and their black-striped counterparts) are correctly matched and connected between the radio and the harness.
- Verifique la configuración del fader y el balance de la radio.
- Ensure the radio's amplifier turn-on wire (if applicable, usually blue) is connected.
- Problemas intermitentes:
- Recheck all wire connections for looseness or poor contact. Ensure all crimps or solder joints are solid.
- Inspect the harness for any pinched or damaged wires.
Presupuesto
- Marca: Metro
- Modelo: 70-2001
- Tipo de conector: IDC (32-pin GM connector)
- Material: ABS, Plástico
- Componentes incluidos: 1994–2005 GM 32-Pin into Car Harness
- Tipo de cable: Power & Speaker
- Dimensiones del artículo (largo x ancho x alto): Aproximadamente 8 x 0.12 x 0.5 pulgadas
- Peso del artículo: Aproximadamente 22.68 gramos
Garantía y soporte
Garantía: This product comes with a 1-Year Limited Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage resulting from improper installation, accident, abuse, or unauthorized modifications.
Atención al cliente: For technical assistance, troubleshooting, or warranty claims, please contact Metra Electronics customer service directly. You can find contact information and additional resources on the official Metra websitio.
Oficial Websitio: metroonline.com






