PPE Fuel Rail Pressure Gauge Harness, (2001-12) Duramax

Recommended to simplify installation, but not required. Fuel rail pressure harness makes installation easier in order to install a Fuel Rail Pressure gauge, otherwise stock harness will need to be modified for installation. Rail Pressure harness connects rail pressure gauge to fuel rail (passenger side). Fits: 2001-2012 Duramax LB7, LLY, LBZ, LMM and LML diesel engines