GM 12-Pin to OBD2 16-Pin Diagnostic Adapter

Pre-OBD2 General Motors vehicles use a 12-pin diagnostic interface, and the standard tool drawer is full of 16-pin scanners. This adapter makes the two shake hands: the GM 12-pin head seats in the vehicle, the OBD2 16-pin female socket out front accepts whatever modern reader the workshop runs.

High-quality materials give the cable the flexibility and durability that daily tool-case duty demands. The same honest advice applies as on every adapter in this family: check the interface support for the specific model before ordering, and send a photo of the port where there is any doubt — a certain fit beats a returned box.

Key features

• GM 12-pin interface to OBD2 16-pin
• Works with 16-pin socket diagnostic tools
• Flexible and durable build
• For pre-OBD2 GM vehicles
• Interface check before dispatch

Specifications

Typical applications

• Shops servicing older GM-era fleets
• Pre-purchase and import inspections
• Mixed-era fleet bays
• Training benches with legacy vehicles

Custom and OEM options

Regional interface variants across the family — Benz 38-pin, Toyota 22-pin, Ford 7-pin, J1939 9-pin and more — build to the same pattern; mixed kits per order.

FAQ

Will it cover all GM brands of that era?
The 12-pin interface served the pre-OBD2 GM range; per-model coverage depends on the tool. Send the model year and port photo for a confirmed match.

How durable is the moulding?
Built for daily coiling and case storage — the same flex-grade materials we use across the interface adapter family.

Samples, packing options, payment terms and warranty conditions are set out in How to Order and Delivery Information.