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Black adapter cable with 12-pin male and 16-pin female connectors

The Perfect Part

The Perfect Part 12 Pin OBD1 to 16 Pin OBD2 Adapter Cable for GM electrical system tool

SKU CH-7NBR-Z06TR

Converts a GM 12 pin OBD1 port to a standard 16 pin OBD2 socket for scanner diagnostics

  • Key featuresPlug and Play, User Friendly; For GM 12 Pin To OBD2 16 Pin C
  • Product weight3.4 oz / 98g
  • Product typeFor GM 12 Pin To OBD2 16 Pin Convertor Adapter
  • Plug-and-play design lets you connect GM 12-pin OBD1 to 16-pin OBD2 scanners instantly
  • Black ABS housing weighs 98 g for easy handling in the workshop
  • Male 12-pin OBD1 connector mates directly with GM diagnostic ports
  • Female 16-pin OBD2 socket accepts standard scan-tool cables
  • Single adapter cable bridges legacy and modern GM diagnostic interfaces

GM 12-Pin OBD1 Adapter

This adapter cable connects a 12-pin OBD1 port on GM vehicles to a standard 16-pin OBD2 diagnostic scanner. It allows technicians to read fault codes and live data from older GM models using modern scan tools. The cable is built with a black ABS housing and weighs 98g. It arrives new and ready for immediate workshop use.

Suits GM OBD1 diagnostics

The cable suits mechanics and DIY owners who service GM cars and light trucks equipped with the 12-pin OBD1 connector. It will not work on vehicles that already have a native 16-pin OBD2 port or on non-GM makes that use a different OBD1 pin-out. Buyers needing bidirectional manufacturer-specific functions should verify scanner compatibility before purchase.

Plug-and-play installation

Installation is a simple plug-and-play process: insert the 12-pin male end into the vehicle connector and attach the scanner to the 16-pin female socket. No drivers or external power are required. The most common issue is a loose fit if the vehicle port pins are corroded or bent; cleaning the port first usually resolves it.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 99% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameThe Perfect Part
Product typeFor GM 12 Pin To OBD2 16 Pin Convertor Adapter
Size & build
Product weight3.4 oz / 98g

Questions about this item

Does my GM vehicle need the original 12-pin OBD1 port for this adapter to connect?

Yes, the adapter plugs directly into the GM 12-pin OBD1 male connector on the vehicle, so that port must be present.

Will my older OBD1-only scanner work through this adapter, or do I need an OBD2 scanner?

The adapter converts the 12-pin OBD1 interface to a 16-pin OBD2 female socket, so an OBD2-compatible scanner is required to read data.

How can I confirm the adapter is communicating with the vehicle ECU after plugging it in?

Power on the OBD2 scanner; if it powers up and displays live data or trouble codes from the GM system, the 12-to-16 pin link is working.

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