These add-on modules are built to work with Dakota Digital's VFD3, VHX, HDX, and RTX gauge platforms, which means most owners running a modern Dakota Digital cluster can add capability without replacing the entire gauge face. This is especially useful for builders who added a module later in a project, such as after installing a turbo or supercharger and wanting to monitor boost pressure, or after switching to a modern EFI system and needing a way to interface with the factory-style gauges.

What These Modules Actually Do

The lineup covers a wide variety of functions. The Fuel Injection Interface Module, along with its various vehicle-specific harnesses, allows Dakota Digital gauges to communicate with aftermarket EFI systems, translating signals the gauge cluster can display accurately. The OB2 Speedometer/Tach Interface Module performs a similar function for vehicles using an OBD2 connection, letting the gauge system pull speed and RPM data directly from the vehicle's onboard computer.

For builders who want environmental and performance data beyond the basics, the GPS/Compass Module adds heading and directional information alongside GPS-based speed reading, while the standalone GPS External Antenna and Outside Air Temperature Sensor support related functions like accurate speed input and ambient temperature readings. The Wideband Air/Fuel Module is a popular choice for anyone tuning an engine, since it displays real-time air and fuel ratio data right on the gauge cluster instead of requiring a separate standalone wideband gauge.

Owners running air ride suspension can add the Quad Air Ride Pressure Module to monitor multiple air bag pressures directly through their existing Dakota Digital display, which is a common addition for lowered trucks and cars running a bag setup. The Pressure Module and Temperature Module offer more general-purpose monitoring for builders who need to track an additional pressure or temperature point that is not covered by the base gauge cluster, while the EGT/Head Temperature Module is aimed at engine builders who want to keep an eye on exhaust gas temperature or cylinder head temperature.

Rounding out the lineup, the Voltage/Current Module tracks electrical system performance beyond a basic voltmeter reading, the Clock Module adds a simple time display to gauge clusters that do not already include one, and the Dakota Digital Tire Pressure Monitoring System brings TPMS functionality into the same display as the rest of your gauges instead of requiring a separate aftermarket unit.

Compatibility Matters

Not every module works with every Dakota Digital gauge cluster, and some of the interface modules and harnesses are built for specific vehicle platforms, including a long list of classic Chevrolet, GMC, and other applications. Before ordering, it is worth confirming that the module you are looking at is compatible with your specific Dakota Digital gauge system, since VFD3, VHX, HDX, and RTX platforms do not all support the same add-ons. Some modules, like the fuel injection interface harnesses, are built around specific vehicle wiring, so matching the harness to your exact application matters just as much as matching the module to your gauge cluster.

Why H&H Classic Parts

At H&H Classic Parts, we know that Dakota Digital's add-on module lineup can be a little overwhelming given how many options are available and how specific some of the compatibility requirements are. If you are not sure which module will work with your gauge cluster, or which harness matches your vehicle, our team is available to help you sort out compatibility before you place an order, so you do not end up with a part that will not talk to your existing system.