Truck had to be towed and diagnosed with bad ignition coil. It was replaced and the dealer ran the codes again and said that there is a problem with the injectors. Don't know whic ones or how many and it was diagnosed during a cold start. Not under warranty either and recommended either replacing all of one side for $1400 or all 8 for $2000. The truck has 35,000 miles on it! I was looking to see if this has been a problem. 2015 Silverado.