• Metra 70-1677-1 Radio Wiring Harness for Select GM Vehicles
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Metra

Metra 70-1677-1 Radio Wiring Harness for Select GM Vehicles

Metra 70-1677-1 Radio Wiring Harness for Select GM Vehicles

$14.99 USD
$14.99 USD
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Before you order

Buy with the right details confirmed

Review the application and system requirements

Confirm the size, power, connections, and included or separately required parts described on this page.

Metra 70-1677-1 is a radio replacement wiring harness for select GM aftermarket radio installations. It connects an aftermarket radio to the vehicle’s factory radio plug so the installer can make clean electrical and speaker connections without cutting the factory harness.

At a Glance

  • Radio replacement wiring harness for select GM vehicles
  • Connects an aftermarket radio to the factory radio connector
  • Color-coded leads support clean aftermarket radio wiring connections
  • Helps avoid cutting or modifying the factory radio harness
  • Provides power and speaker connection wiring where applicable

System / Wiring Notes

  • Designed for compatible factory radio connectors in listed vehicle applications
  • Color-coded leads support standard aftermarket radio power, ground, illumination, and speaker connections where applicable
  • This harness does not retain every factory feature by itself; additional interfaces may be required

Exact Vehicle Compatibility

Find your vehicle below, then match the model year and factory-equipment details in the same row. Factory radio, amplifier, navigation, trim, speaker location, and connector differences can change which installation parts are required. If anything differs, contact MCOR before ordering.

Make Model Years Factory Equipment / Qualifier
Buick Century 1982-1987 Non-amplified factory audio system
Buick Electra 1984-1987 Non-amplified factory audio system
Buick LeSabre 1984-1987 Non-amplified factory audio system
Buick Regal 1984-1987 Non-amplified factory audio system
Buick Riviera 1983-1985 Non-amplified factory audio system
Buick Skyhawk 1982-1987 Non-amplified factory audio system
Buick Skylark 1983-1986 Non-amplified factory audio system
Cadillac Brougham 1987-1989 Non-amplified factory audio system
Cadillac Cimarron 1982-1988 Non-amplified factory audio system
Cadillac Coupe DeVille 1985-1987 Non-amplified factory audio system
Cadillac DeVille 1985-1987 Non-amplified factory audio system
Cadillac Eldorado 1983-1987 Non-amplified factory audio system
Cadillac Fleetwood 1985-1987 Non-amplified factory audio system
Cadillac Fleetwood 1988-1989 Non-amplified factory audio system
Cadillac Fleetwood 1990-1992 less Brougham; Non-amplified factory audio system
Cadillac Seville 1984-1987 Non-amplified factory audio system
Chevrolet Astro Van 1985-1990 Non-amplified factory audio system
Chevrolet Blazer 1973-1987 full size; Non-amplified factory audio system
Chevrolet Blazer 1988-1991 full size; Non-amplified factory audio system
Chevrolet C/K Pickup 1973-1986 full size; Non-amplified factory audio system
Chevrolet Camaro 1982-1989 Non-amplified factory audio system
Chevrolet Caprice 1985-1987 Non-amplified factory audio system
Chevrolet Caprice 1988-1990 Non-amplified factory audio system
Chevrolet Cavalier 1982-1987 Non-amplified factory audio system
Chevrolet Cavalier 1988-1990 Non-amplified factory audio system
Chevrolet Celebrity 1984-1989 Non-amplified factory audio system
Chevrolet Citation II 1985 Non-amplified factory audio system
Chevrolet Corvette 1978-1982 Non-amplified factory audio system
Chevrolet Corvette 1984-1989 Non-amplified factory audio system
Chevrolet El Camino 1982-1985 Non-amplified factory audio system
Chevrolet El Camino 1986-1987 Non-amplified factory audio system
Chevrolet G-Series Van 1986-1987 Non-amplified factory audio system
Chevrolet Impala 1978-1984 Non-amplified factory audio system
Chevrolet Impala 1985-1990 Non-amplified factory audio system
Chevrolet Monte Carlo 1978-1985 Non-amplified factory audio system
Chevrolet Monte Carlo 1986-1988 Non-amplified factory audio system
Chevrolet Nova 1985-1988 Non-amplified factory audio system
Chevrolet R/V Pickup 1987-1991 full size; Non-amplified factory audio system
Chevrolet S-10 Blazer 1982-1985 Non-amplified factory audio system
Chevrolet S-10 Blazer 1986-1987 Non-amplified factory audio system
Chevrolet S-10 Blazer 1988-1989 Non-amplified factory audio system
Chevrolet S-10 Pickup 1982-1985 Non-amplified factory audio system
Chevrolet S-10 Pickup 1986-1988 Non-amplified factory audio system
Chevrolet Suburban 1973-1987 Non-amplified factory audio system
Chevrolet Suburban 1988-1991 Non-amplified factory audio system
GMC C/K Pickup 1973-1986 Non-amplified factory audio system
GMC Jimmy 1978-1987 full size; Non-amplified factory audio system
GMC R/V Pickup 1987-1991 Non-amplified factory audio system
GMC S-15 Jimmy 1982-1985 Non-amplified factory audio system
GMC S-15 Sonoma 1986-1992 Non-amplified factory audio system
GMC Safari 1985-1990 Non-amplified factory audio system
GMC Suburban 1973-1984 Non-amplified factory audio system
GMC Suburban 1985-1987 Non-amplified factory audio system
GMC Suburban 1988-1991 Non-amplified factory audio system
Oldsmobile Cutlass Calais 1985-1987 Non-amplified factory audio system
Oldsmobile Cutlass Calais 1988-1989 Non-amplified factory audio system
Oldsmobile Cutlass Ciera 1984-1987 Non-amplified factory audio system
Oldsmobile Cutlass Supreme 1984-1987 Non-amplified factory audio system
Oldsmobile Cutlass Supreme 1988-1989 Non-amplified factory audio system
Oldsmobile Eighty-Eight 1985 Non-amplified factory audio system
Oldsmobile Eighty-Eight 1986-1987 Non-amplified factory audio system
Oldsmobile Eighty-Eight 1988 Non-amplified factory audio system
Oldsmobile Firenza 1982-1988 Non-amplified factory audio system
Oldsmobile Ninety-Eight 1985 Non-amplified factory audio system
Oldsmobile Ninety-Eight 1986-1987 Non-amplified factory audio system
Oldsmobile Ninety-Eight 1988 Non-amplified factory audio system
Oldsmobile Omega 1980-1982 Non-amplified factory audio system
Oldsmobile Omega 1983-1984 Non-amplified factory audio system
Oldsmobile Toronado 1983-1987 Non-amplified factory audio system
Oldsmobile Touring Sedan 1988-1990 Non-amplified factory audio system
Pontiac 6000 1982-1985 Non-amplified factory audio system
Pontiac 6000 1986-1987 Non-amplified factory audio system
Pontiac 6000 1988-1989 Non-amplified factory audio system
Pontiac Bonneville 1985-1987 Non-amplified factory audio system
Pontiac Bonneville 1988-1991 Non-amplified factory audio system
Pontiac Bonneville Safari Wagon 1987-1989 Non-amplified factory audio system
Pontiac Fiero 1984-1988 Non-amplified factory audio system
Pontiac Firebird, Firebird Trans Am 1982-1987 Non-amplified factory audio system
Pontiac Firebird, Firebird Trans Am 1988-1989 Non-amplified factory audio system
Pontiac Grand Am 1985-1987 Non-amplified factory audio system
Pontiac Grand Am 1988-1989 Non-amplified factory audio system
Pontiac Grand Prix 1985-1987 Non-amplified factory audio system
Pontiac J-2000 1982-1988 Non-amplified factory audio system
Pontiac Parisienne 1983 Non-amplified factory audio system
Pontiac Parisienne 1984-1986 Non-amplified factory audio system
Pontiac Sunbird 1982-1987 Non-amplified factory audio system
Pontiac Sunbird 1988 Non-amplified factory audio system

Fitment note: Year and model alone are not always enough to confirm compatibility. Match every factory-equipment qualifier shown for your vehicle, and contact MCOR Automotive if the radio, amplifier, navigation, speaker, camera, trim, or connector details are uncertain.

Installation Notes

  • Confirm exact vehicle fitment, factory audio system, and radio connector before installation
  • Additional installation parts such as a dash kit, antenna adapter, steering wheel control interface, or integration interface may be required
  • Professional installation is recommended for best results

What’s in the Box

  • Metra 70-1677-1 radio replacement wiring harness

Technical Specifications

  • Brand: Metra
  • Model: 70-1677-1
  • Product Type: Radio replacement wiring harness
  • Application: select GM aftermarket radio installations
  • Compatibility Type: Vehicle-specific

Identifiers & Packaging

  • MPN: 70-1677-1
  • UPC: 086429002566
  • Sold As: Each
  • Included Components: Radio replacement wiring harness

Why Buy From MCOR Automotive

  • Authorized retailer for the brands we sell
  • Specialists in vehicle audio integration, radio replacement parts, and installation accessories
  • 22+ years of professional automotive electronics experience
  • Expert support for compatibility verification and proper setup
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