Overview Bring your 1978–88 G-Body back to life with an all-electric, OE-style cluster that installs cleanly and reads accurately. This direct-fit package includes a speedometer, tachometer, clock, and fuel, oil, temp, and volt gauges with Hybrid LED Lighting that blends perimeter glow with back-lighting for even illumination and excellent nighttime visibility. Turn signals and high-beam indicators remain in the stock locations to preserve factory ergonomics. The kit ships with a model-specific harness, push-button speedometer calibration, new acrylic lens, and a built-in ECM signal filter switch. Classic Instruments’ ZST™ (Zeus Speedometer Technology) is integrated—no external control boxes—so it works directly with ECM or VSS signals. The fuel gauge features a rear-mounted selector switch to match most factory senders or Classic Instruments senders. Use your existing diffuser for a factory-true finish. Install using the existing diffuser Features Includes new check engine & high beam sockets with LED bulbs to replace original and provide power from the gauge circuit board Includes wiring harness & push-button calibration for programming and ease of installation Hybrid lighting to match the original styling and perimeter lighting and improve visibility with backlighting Includes GM sending unit kit – complete, no separately purchased parts All-electric cluster for ease of programming and installation Built-in Zeus Speedometer Technology, no external control boxes needed and will work with any available speed signals Installs with existing diffuser for original look OE Style to mimic original gauge cluster look Built-in ECM signal filter switch to remove signal noise for smoother speedometer operation
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