Low Fuel Pressure Red LED Alarm Kit; Incl. 5psi Pressure Switch/LED Assembly w/2 pc. Bezel/Blade Connector/Mini-Fuse Tapper/Flag Connector/Tapped Banjo Bolt/Sealant Washer;A failing lift pump will not only cause sub-standard performance, it can cause costly damage to the injection pump. Keep tabs on your truck's fuel system with the BD low fuel pressure LED kit, which incorporates a red or amber LED that illuminates if lift pump pressure falls below spec. Inexpensive protection and easy installation!