P CODES (POWERTRAIN) P1800 - P1899 P1870

Computer Problem 1997 Chevy Astro 6 Cyl Two Wheel Drive Automatic I Drive This Vehicle Prox 450 - 500 Miles Per Week. I Was Getting...

Hello I Have 3 Codes And Need To Know What To Get To Fix This Truck. The First Is P1870 2nd P1345 3rd P0430 Thanks For The...