Dakota Digital VHX is the easiest way to add a complete gauge cluster system for both the LS and LT engine series.
Dakota uses the signals from the OBD connector in the GM Performance wiring harness to display speed, rpm and water temperature. The oil pressure must be driven by Dakota’s proprietary sender 03-8 which can be installed in the oil filter boss that contains a stock GM sensor. To drive the signals you need BIM-01-2.
Here’s the VHX control panel mounted in the dash. DD uses cat 5 conventional computer cables to connect the gauges into the control box (lower right corner).
The installation manual is here for the VHX and here for the BIM-01-02.