70-1677-1

a premium OEM-style radio replacement harness designed to simplify aftermarket stereo installations in select General Motors vehicles. This plug-and-play harness allows installers to connect a new radio without cutting factory wiring, helping preserve the vehicle’s original electrical system while speeding up installation time.

Features & Benefits

• Direct plug-and-play installation
• No cutting of factory wiring required
• Color-coded EIA standard wiring
• OEM-quality molded connectors
• Simplifies aftermarket radio installation
• Maintains factory wiring integrity
• Supports power and four-speaker connections
• Ideal for single-DIN and double-DIN stereo upgrades
• Professional installer preferred solution

Specifications

• Product Type: Radio Wiring Harness
• Model: 70-1677-1
• Harness Style: Factory radio replacement harness
• Connector Type: 12-pin GM connector
• Wiring Type: Standard EIA color-coded wires
• Installation Type: Plug-and-play
• Application: Aftermarket radio installation
• Vehicle Compatibility: Select GM vehicles 1973-1993

Vehicle Compatibility

Compatible with many select GM vehicles including:

• Chevrolet
• GMC
• Buick
• Cadillac
• Oldsmobile
• Pontiac

Common vehicle applications include:

• Chevy C10/C20/K10 trucks
• Chevrolet Camaro
• Chevrolet Monte Carlo
• Chevy S10 & Blazer
• GMC Jimmy & Sonoma
• Buick Regal
• Cadillac DeVille
• Pontiac Firebird
• And many additional GM applications from 1973-1993

Always verify vehicle compatibility before purchase.

Installation Notes

The 70-1677-1 plugs directly into the factory radio connectors on one side, while the opposite side uses color-coded wires that connect to the aftermarket radio harness. This allows for faster and cleaner installations without modifying the vehicle’s original wiring. Additional installation accessories such as:

• Dash kits
• Antenna adapters
• Steering wheel control interfaces

may also be required depending on the vehicle and radio being installed