2-1/16in. FUEL RAIL PRESSURE; 0-30K PSI; PHANTOMUltra high pressures in modern direct injected diesel applications require precise monitoring to assure the longevity and power output of your engine. Using AutoMeter's advanced Digital Stepper Motor Drive, this gauge provide the most accurate possible reading, professional grade reliability and smooth pointer movement. Connects directly to your factory sensor with an included wiring harness. Incandescent Lighting Illuminates Around Perimeter Of Dial 12 And 16V Compatible Incl. Wiring Harness Incl. Bulb/Socket Assembly/Red And Green Bulb Covers Incl. Mounting Hardware/Instructions Incl. Wire Harness Connects To OE Fuel Rail Press. Sensor Wiring Digital Stepper Motor Provides Unmatched Accuracy Application Summary: Year Make/Model 2001-2006 Chevrolet Silverado 2500 HD 2001-2006 Chevrolet Silverado 3500 2003-2007 Dodge Ram 2500 2003-2007 Dodge Ram 3500 2001-2006 GMC Sierra 2500 HD 2001-2006 GMC Sierra 3500