hey all i got a reader and here are the codes for my 2003 chevy HD 2500 4X4 8.
1 liter vortech the first code and this code will erase but as soon as i turn off truck i get the code back P1516 manufacture control vehicle speed idle control auxiliar inputs this is the code that is giving me the reduced engine power on the dash i also got P0802 transmission control system MIL request circuit open does anyone know what would cause these codes to appear i do not drive this truck everyday it is my tow vehicle for my vacation and now i dont get to go until it is fixed i did clear the codes but the the 1 comes back every time i start the truck so i am lost here any ideas anyone please let me know so i can fix and leave on vacationthank you uncle p