Metra 70-1855 Tuner Bypass Harness for Select GM Vehicles 1985-1994

Metra 70-1855 is a tuner bypass harness for select Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac vehicles from 1985-1994. It provides a tuner bypass connection for compatible GM vehicles that require bypassing the factory tuner location.

Key Features

• Tuner bypass harness for select GM vehicles
• 5-foot harness length supports routing to the tuner location
• Designed for compatible Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac applications
• Supports aftermarket radio installation where a factory tuner bypass is required
• Helps avoid cutting factory wiring when matched to the correct application

System / Wiring Notes

• Verify factory tuner configuration before installation
• Additional dash kit, antenna adapter, or interface parts may be required
• Vehicle fitment varies by model and factory audio system

Vehicle Compatibility

Installation Notes

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

What’s in the Box

• Metra 70-1855 tuner bypass harness

Technical Specifications

• Brand: Metra
• Model: 70-1855
• Product Type: Tuner bypass harness
• Application: Select Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac tuner bypass radio installations
• Compatibility Type: Vehicle-specific
• Factory Feature: Tuner bypass
• Harness Length: 5 feet

Identifiers & Packaging

• MPN: 70-1855
• UPC: 86429105175
• Sold As: Each
• Included Components: Tuner bypass 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