12707877 Replaces Part Number 12689504
Looking to convert your LT1 High Pressure Fuel Pump into a LT4 High Pressure Fuel Pump? This is the Harnesses needed to do this conversion! GM changed the connector design on 2019+ Models and therefore would require the 2016-2018 Fuel Rail Harness that includes the High Pressure Fuel Pump Plug. This harness is plug and play, however, to run a LT4 High Pressure Fuel Pump on a LT1 Model, you will need tune the vehicle for it to run properly. |