Connect older GM diagnostics to modern readers with this 12-pin OBD1 to 16-pin OBD2/OBDII adapter. Built with plated metal contacts and a tough molded housing, it maintains a firm mechanical fit and reliable electrical pass-through so you can read fault codes and view basic live parameters on many vehicles equipped with the GM-style 12-pin ALDL port. Ideal for classic-car upkeep, restorations, and everyday troubleshooting in home garages or professional shops.

Specifications

Interface: 12-pin male (GM-style ALDL) → 16-pin female (OBD2/OBDII)

Length: approx. 41.5 cm / 16.3 in

Weight: approx. 102 g / 3.6 oz

Build: plated metal contacts; abrasion-resistant molded shell

In the Box

1 × 12-pin OBD1 to OBD2 (16-pin) adapter cable

(Scanner/diagnostic tools not included)

Use Tips

Align the 12-pin end with the vehicle's ALDL port and seat fully.

Attach your OBD2/OBDII-style scan tool to the 16-pin female side.

Power on your tool and follow its prompts to read codes or view data.

Disconnect after use to avoid unnecessary connector strain.

Compatibility & Compliance

Intended for vehicles that use a GM-style 12-pin ALDL diagnostic port (commonly found on many pre-1996 models).

Performance varies by scanner protocol support and pinout; not all tools support every system.