I have a 2003 Silverado Hd duramax. I just changed the injectors and it started and ran fine but it threw 2 egr faults the next day and started surging, i brought it home and pulled it into the garage and it stalled and now it will not start, i looked for any hoses or wires the might have come loose and didnt notice any. I checked the coolant level and it is low and i checked the oil level and it was also low. I filled the fluids but i cant get it started...any help?