Thanks for the info. Mine seem to be working fine, but I'm going to do some data logging to make sure.Funny to see this thread. I have about 38,xxx miles on my fully stock SS and I had to replace my cylinder #5 injector about 2 weeks ago. For the past 2 years, I would intermittently get a misfire check engine light (CEL flashes, also sets off traction control messages in the DIC). I had this happen probably 3 times and each time it would instantly clear and act like nothing happened and wouldn't set codes (at least that I could read with my bluetooth scanner). I never thought to check misfire history on my data logging because it would instantly clear like nothing happened, and I honestly thought it was something to do with traction control. Long story short, the injector finally fully failed and gave an injector #5 and misfire #5 MILs. I checked misfire history this time and saw that #5 misfires (current and historical) were through the roof, checked the injector circuit and electrical was fine. I ordered an injector online for about $45 since the dealer wanted $130 and I bought new plugs.
I replaced the plugs and Injector #5, anyone who is nervous about this, don't be, just work on a cool engine bay and research how the injector electrical plug operates. The #8 plug was harder to replace than the injector. I checked the injector for function once it was out of the vehicle and compared resistance to the rest of my injectors and it was reading about double the resistance of the rest, so mine had an internal short somewhere. On the bench I could get it to function sometimes by tapping it, but it would stop functioning again within about 10-30 seconds.