multiple engine codes
Howdy I'm new and someone pointed me to yalls direction. I have a 2008 Gc 5.7l.
I am getting the following codes
P3401 cyl1, p3425 cyl4, p3441 cyl6, and p3449 cyl7. I did get p0884 tcm but that went away. I am also now getting oil light and random etc light. It idles high and rough for a few seconds then dies. I checked connections on tcm and all good and no burnt wires. Not sure what to do next because so many cylinders. The firing order puts the codes as odds so points to a valve deactivation issue. Any help would he greatly appreciated.