The Dakota Digital RTX Series Gauge Cluster for the 1984–1987 Buick Regal, T-Type, and Grand National delivers the ultimate compromise for G-body enthusiasts: a flawless, factory-original look when the ignition is off, backed by cutting-edge, late-model instrumentation when you turn the key.
Part of Dakota Digital's Retrotech philosophy, this system architecture utilizes a CNC-machined housing that fits directly into your stock dash layout, retaining the iconic sweeping horizontal speedometer and bar-graph tachometer that defined the 1980s turbo Buick experience.
The Best of Both Worlds: OEM Style & Modern Tech
At a casual glance, the cluster looks like a pristine factory unit. However, behind the authentic faces lies a full modern conversion:
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The Stealth Display: Hidden analog sweeps for Oil Pressure and Water Temperature frame the cluster perimeter, remaining invisible until the backlighting activates.
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Dual TFT Digital Message Centers: Positioned seamlessly between the main sweeps, these high-definition programmable screens display critical diagnostic data and performance stats without cluttering the vintage aesthetic.
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RGB LED Backlighting: Features full RGB electronic backlighting with over 30 user-selectable color schemes and 12 factory preset themes. You can independently change the color of the needles, gauge sweeps, and digital displays, with separate configurations automatically toggling for day and night driving.
Gauge & Indicator Breakdown
The RTX system upgrades your dash to a comprehensive 6-gauge electronic package:
| Gauge Type |
Display Style & Range |
| Speedometer |
Analog Horizontal Sweep (0–140 MPH / Optional Metric 0–220 km/h) |
| Tachometer |
Digital Bar-Graph (0–8,000 RPM) |
| Oil Pressure |
Hidden Analog Sweep (0–80 psi) |
| Water Temperature |
Hidden Analog Sweep (100–260°F / Optional Metric 40–120°C) |
| Fuel Level |
Analog Sweep (E, 1/4, 1/2, 3/4, F) |
| Voltmeter |
Digital Display within TFT Message Center (9–17 VDC) |
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Built-in Indicators: Integrates modern diagnostics directly into the face, including Turn Signals, High Beams, Check Engine, Parking Brake, Cruise Control, and Gear Position (requires optional sensor). Additionally, every analog gauge contains a built-in red LED warning light that flashes automatically during an over-limit condition.
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Performance Meters: Track your G-body's metrics on the strip with an integrated 0–60 MPH timer, 1/8 and 1/4-mile timers, trap speed recall, and high RPM/MPH logging.
Centralized Setup & Bluetooth Calibration
The RTX series completely eliminates messy behind-the-dash wiring by routing all incoming signals to a single Central Control Box measuring just 5.5" x 3.5" x 1".
All calibration—including matching the odometer to your car's mileage (a one-time user setup) and programming the fuel sending unit—can be handled directly through integrated, capacitive-touch switches hidden on the gauge face. For even faster setup, the system features built-in Bluetooth compatibility. Simply download the free app to your Apple or Android device to configure your color themes, adjust warning parameters, calibrate your speedometer, or read real-time diagnostics on your phone.
Included Sensors & Vehicle Notes
The kit ships complete with all necessary ground-isolated solid-state sending units, including a 1/8" NPT water temperature sensor, a 1/8" NPT oil pressure sensor (with NPT and metric adaptation bushings), and a electronic speed pulse generator that replaces your factory GM speedometer cable.
Grand National / T-Type Technical Notes:
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Boost Integration: To seamlessly display live boost data directly inside the TFT digital message center, make sure to add the optional SEN-09-7 sensor module to your build.
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Ignition System Compatibility: Due to the unique nature of the factory 3.8L Turbo ignition system, some Grand Nationals may require the SGI-17 tachometer interface adapter to ensure a stable, clean RPM signal.
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Note: The factory plastic dash bezel is not included; the system is designed to bolt directly behind your existing OEM bezel.
