codes p0300 and p16a1 and p0157
 

ok so did some upgrades: halltech intake, katech ported tb, borla h pipe and granatelli plug wires. car started fine for a few minutes then felt sluggish and flashing check engine light came on with service stabilitrak and service rear diff light on dash checked code and was only p0300 so re-seated all plug wires and they are all good checked all hoses under hood and all connected. with getting the lean code do i need to get this tuned? :frusty: not sure what the heck my issue is at this point?

Sorry 2015 c7 z51

ok went out to look at this again and changed out the tb to the stock one. cleared the codes and getting a permanent code of a p0300 and p16a1 with the pending code of a p0300 and the serv stabilitrack and serv rear diff and flashing check engine code

ok bought hp tuners and seeing a misfire on 7 and 8 how do the cylinders count on the block?

Sounds like a misfire issue. Try replacing the plugs and wires.