1988-1991 Chevy/GMC Pickup/SUV RTX Digital Instrument System by Dakota Digital

Classic Look, Modern Performance

When Chevrolet and GMC introduced the redesigned full-size truck lineup in 1988, it set the tone for modern pickup design. Known affectionately as the OBS (Old Body Style) generation, these trucks blended durability with comfort and innovation. Rounded lines, aerodynamic curves, and flush headlights gave them a cutting-edge look for the late 1980s. Today, the 1988-1991 Chevy and GMC pickups and SUVs remain a favorite among enthusiasts for their timeless style and reliability.

To complement that heritage while embracing modern technology, Dakota Digital created the RTX Digital Instrument System—a perfect fusion of OEM styling and advanced functionality. This system delivers late-model digital precision within the original dash design, giving your OBS truck a fresh and refined upgrade without compromising its factory charm.

You can explore the 1988-1991 Chevy/GMC Pickup/SUV RTX Digital Instrument System directly on store.gaugemagazine.com.

*Bezel not included, shown for visual/presentation purposes.
System uses OEM or reproduction style bezel.

OEM Styling Meets Next-Generation Engineering

The Dakota Digital RTX series is engineered with one goal in mind: to retain the classic OEM appearance while offering the latest in digital instrumentation technology. Every gauge cluster is CNC-machined and assembled in-house, ensuring precision craftsmanship and reliability that far surpasses factory options.

At first glance, this system could easily be mistaken for the original GM instrument cluster. But once you power it on, vibrant LED backlighting and a fully customizable TFT message center reveal its true power. Choose from over 30 color combinations to match your interior lighting theme—whether you prefer a cool blue glow, a vivid red accent, or a classic white tone.

Analog Gauges with Modern Accuracy

The RTX system integrates precision analog dials that retain the iconic Chevy look while operating with cutting-edge electronic accuracy. Each gauge is engineered for smooth response and clear readability, with optional metric conversions available.

Analog Gauge Readouts

• Speedometer: 0–120 MPH (optional metric 0–200 km/h)

• Tachometer: 0–8,000 RPM

• Oil Pressure: 0–80 PSI

• Water Temperature: 100–260°F (optional 40–120°C)

• Fuel Level: E, ¼, ½, ¾, F

• Voltmeter: 9–17 VDC

Each analog sweep incorporates a red LED indicator to quickly alert you to any critical warning condition—excluding the speedometer.

If your truck’s dash setup requires additional indicators, you can easily repurpose unused warning lights for your application.

Digital Message Center

Behind the clean analog face lies a powerful TFT digital display that provides a range of vital information. Dakota Digital’s central control box allows easy wiring and setup, minimizing installation time and simplifying calibration.

Standard Displays

• Odometer (One-time user-settable, up to one million miles)

• Dual Trip Meters (A/B 0–9,999.9 mi)

• 12-Hour Clock

• Estimated Range / Miles-to-Empty

Performance Meters

• 0–60 MPH Timer (0–100 km/h)

• ⅛ and ¼ Mile Time and Trap Speed

• High-Speed Recall

• High-RPM Recall

This system isn’t just a cluster—it’s an onboard data center for real-time performance tracking.

Built-In Indicators

The RTX Instrument System includes comprehensive indicators for both factory and modern applications:

• Left and Right Turn Signals

• High Beam

• Check Engine

• Parking Brake

• Cruise Control (On / Engaged, when equipped)

• Gear Position (with optional GSS-3000 Gear Position Sensor)

• 4×4 Indicator (when equipped)

• Wait-to-Start (for diesel applications)

• Two Auxiliary Inputs (user-programmable labels)

These built-in notifications keep you informed of critical functions at a glance, while preserving a clean, OEM-style dash layout.

Lighting Customization and Display Themes

No other instrument cluster gives you this level of personalization. The RTX series includes over 30 user-selectable colors that can be applied independently to the needles, sweeps, and digital displays. You can adjust both daytime and nighttime brightness using the setup menu—or add the DIM-1 rotary dimmer for real-time control.

Factory Preset Themes

With 12 factory presets, you can instantly apply professional color schemes—or customize each lighting zone manually to match your truck’s interior. Full RGB LED technology delivers crisp contrast and sharp visibility both day and night.

Included Sensors and Installation Hardware

Dakota Digital includes everything needed for a clean and straightforward installation. Each system features:

• Water Temperature Sensor: 1/8" NPT, ground-isolated with 10 ft harness

• Oil Pressure Sensor: 1/8" NPT solid-state with 10 ft harness

• Cable-Driven Speed Sensor / Generator: Directly replaces GM-style speedometer cables, includes 10 ft harness

  • For installations needing extra clearance, add the Dakota Digital 130011 Relocation Adapter.

• Bushing Kit: Includes 1/8" to 1/4", 3/8", and 1/2" NPT bushings, plus 12mm and 16mm × 1.5 threads

Control Box Dimensions: 5.5" × 3.5" × 1"

Every piece of hardware is designed to simplify wiring and ensure a seamless connection between your sensors, control box, and display cluster.

Pushbutton and Mobile App Control

Dakota Digital simplifies calibration with intuitive controls. A two-sided rocker switch provides easy access to setup menus and real-time data—right from the driver’s seat. Once configured, that same button toggles between driving and setup modes.

Prefer to tune your setup wirelessly? The RTX mobile app, available for both Android and iOS, allows Bluetooth configuration and live data streaming. View diagnostic information, customize your display, or perform calibration using your smartphone or tablet—no tools required.

Speedometer and Fuel Calibration Made Simple

Traditional calibration processes can be tedious. With the Dakota Digital RTX, you can calibrate your speedometer and fuel level through a few quick button taps and a short test drive. If you add the Dakota Digital GPS-50-2 GPS Speed Sensor, calibration becomes automatic—saving time and ensuring unmatched accuracy on every drive.

Why Upgrade to the Dakota Digital RTX Series?

1. OEM Appearance

Dakota Digital goes beyond basic digital conversions. The RTX series is designed with OEM layout precision—matching factory gauges and indicators perfectly to maintain a clean, stock-appearing dashboard.

2. Enhanced Functionality

You’ll enjoy all the benefits of modern electronics—performance timers, customizable lighting, diagnostic readouts—without sacrificing your truck’s period-correct style.

3. Simple Installation

A central control box, labeled harnesses, and plug-and-play sensors make installation approachable even for weekend builders.

For a professional finish, pair this system with a complete Dakota Digital wiring solution from store.gaugemagazine.com.

4. Customizable User Experience

Over 30 lighting options, dual brightness control, mobile app integration, and on-the-fly adjustments let you make your dashboard truly yours.

5. Built for Longevity

From CNC aluminum housings to in-house electronics, every RTX system is crafted to meet the demands of enthusiasts who expect long-term durability and professional performance.

Applications

This Dakota Digital RTX cluster fits the following models:

• 1988–1991 Chevrolet Pickup

• 1988–1991 GMC Pickup

• 1988–1991 Chevy Tahoe & Chevy Suburban

• 1988–1991 GMC Yukon

Installation requires minimal modification and uses existing dash mounting points. It’s the ultimate direct-fit upgrade for OBS enthusiasts who want to modernize without losing originality.

Recommended Accessories

For best results, pair your RTX system with compatible Dakota Digital accessories available on store.gaugemagazine.com:

• GSS-3000 Gear Shift Sensor: Adds digital gear position display for automatic transmissions.

• DIM-1 Light Dimmer: On-the-fly brightness control for custom lighting effects.

• GPS-50-2 GPS Speed Sensor: Simplifies speedometer calibration and ensures pinpoint accuracy.

• 130011 Relocation Adapter: For custom builds requiring additional clearance for speed sensor placement.

Installation and Support

Dakota Digital provides detailed installation instructions and wiring diagrams. Each RTX kit comes with:

• Labeled wiring harnesses

• Rocker switch

• Sensors

• Mounting hardware

• User manual and quick-start guide

You’ll also find installation videos, wiring tips, and technical support on store.gaugemagazine.com.

Specifications Summary

Modern Functionality for Classic OBS Style

Upgrading your 1988–1991 Chevy or GMC with the Dakota Digital RTX Digital Instrument System enhances both performance and aesthetics. You’ll maintain the truck’s nostalgic look while gaining modern accuracy, visibility, and customization. Whether your OBS is a daily driver, show build, or resto-mod project, this cluster is the perfect finishing touch.

Bring 21st-century technology into your 1988–1991 truck without compromising its original soul.

Order your 1988-1991 Chevy/GMC Pickup/SUV RTX Digital Instrument System today from store.gaugemagazine.com and experience the perfect blend of heritage and innovation.