GM 12 Pin OBD1 to 16 Pin OBD2 Adapter Cable – Diagnostic Cable for Workshops

GM 12 Pin OBD1 to OBD2 adapter cable for stable diagnostic connections

• ✔ Precisely fitting 12-pin to 16-pin OBD2 adapter for GM vehicles with a manufacturer-specific diagnostic port
• ✔ Stable signal transfer for reliable diagnostic work
• ✔ Sturdy plug connections for daily workshop use
• ✔ High-quality contacts to minimise connection faults
• ✔ Designed for professional diagnostic environments and private users

The GM 12 Pin OBD1 adapter cable connects the manufacturer-specific 12-pin diagnostic port on the vehicle to the standard 16-pin OBD2 socket. Existing OBD2 diagnostic devices, workshop interfaces and handheld scanners can therefore continue to be used without buying a special solution.

This item is an adapter or connecting cable, not a diagnostic device or scanner. The actual diagnostic function depends on the diagnostic device used and the scope of its software.

Please note: not the banana plug version

On the tool side, this cable ends in a standard 16-pin OBD2 socket. It is not to be confused with the cable also available in our shop, “GM 12Pin to 6 banana plugs adapter cable for KTS diagnostic devices”, which is intended for Bosch KTS devices with banana plug connections.

If your diagnostic device has a normal 16-pin OBD2 plug, this cable is the right one.

What the adapter is needed for

Before the uniform 16-pin OBD2 connector was introduced, manufacturers fitted their own diagnostic sockets. A modern diagnostic device with an OBD2 connection does not fit there directly. The adapter cable creates the physical link required for the diagnostic hardware to communicate with the vehicle.

Clean signal transfer for reliable diagnostic data

During diagnostic work the quality of the data transfer is decisive. Low-quality adapters can cause dropped signals, communication errors or unstable connections.

The adapter cable has solid plug contacts and a robust cable structure to minimise interference during diagnosis. Communication between vehicle and diagnostic device therefore stays reliable even during longer work.

Robust build for workshop and everyday use

The cable was developed for frequent connecting and disconnecting. The hard-wearing sheath protects the wires from the strain of daily use.

• Hard-wearing cable sheath
• Precisely manufactured plug connections
• Firm fit without unnecessary play
• High contact quality to avoid transfer errors

Compatibility

The adapter is intended for vehicles with a manufacturer-specific 12-pin diagnostic port. On the tool side it ends in a standard 16-pin OBD2 socket and is therefore suitable for OBD2 handheld scanners, workshop diagnostic devices and USB and Bluetooth diagnostic interfaces.

Compatibility depends on the vehicle and the diagnostic device. Before buying, please check on the vehicle whether a 12-pin port is actually fitted, and whether the diagnostic device and its software support the vehicle systems you need. Which functions are available depends solely on the diagnostic device and the scope of its software.

Areas of use

• Reading fault codes with compatible devices
• Monitoring live data and sensor readings
• Diagnostic work in workshops
• Checking a vehicle before purchase or servicing
• Communicating with control units via compatible diagnostic hardware

Technical data

Scope of delivery

– GM 12 Pin OBD1 to 16-pin OBD2 adapter cable

Purchase on account available (Klarna or PayPal).

Free shipping from €50 (Germany) – within the EU from €100

Delivery

Delivery is made to the delivery address provided by the customer during the ordering process. By way of exception, where PayPal is selected as the payment method, the delivery address stored with PayPal at the time of payment is decisive.

If delivery to the customer was not possible and the transport company returns the goods to the seller, the customer bears the costs of the unsuccessful delivery. This does not apply where the customer exercises their right of withdrawal by refusing acceptance, where they are not responsible for the circumstance that made delivery impossible, or where they were temporarily prevented from accepting the goods – unless the seller had given them reasonable advance notice of the delivery.

Shipping costs

• Germany: free from an order value of €50, below that €3.99
• European Union: free from an order value of €100, below that €14.99
• Switzerland: €20.00
• United Kingdom: GBP 20.00

Delivery area and delivery time

We deliver to Germany, to the 26 other countries of the European Union and to Switzerland and the United Kingdom. We are currently unable to deliver to other countries.

For deliveries to Switzerland and the United Kingdom, customs duties, import taxes or other charges may be incurred in addition; these are borne by the customer.

The delivery time within Germany is usually 1–3 working days.

Payment methods

You can pay by credit card (Visa, Mastercard, Maestro), PayPal, Klarna (purchase on account or instalments), Shop Pay, Apple Pay, Google Pay, advance payment by bank transfer or cash on delivery.

Cash on delivery is only available for deliveries within Germany from an order value of €50. An additional fee of €9.99 is charged for it.

Digital licences and activations

Update licences, secure gateway activations and HaynesPro access are digital goods. No shipping costs apply – you will receive the activation code by email once payment has been received, usually within 1–3 working days.

If the licence is tied to a device, enter your device’s serial number directly in the order form when purchasing. That way we can set up the activation for your device without further enquiries.

Please note: for digital licences the right of withdrawal expires as soon as we have begun providing the item and you have expressly agreed to this beforehand. For devices and all other goods, the statutory right of withdrawal applies unchanged.