I have a 2008 Sierra 1500 standard cab , 8" box with the 5.3L. I have the standard gage cluster which does not have oil pressure and voltage. Does anyone know if the factory wiring has these plugs in the harness. The question is can I replace my existing instrument cluster with the deluxe version which has these 2 extra gages. I assume I'll need the oil pressure sender but that won't be a problem if the harness has all of these connectors. Thanks
