But @j cat, won't the TAC light the reduced power alarm and throw a code?
The OP is getting a CEL, but one that indicates a mis-fire.
...so you use the entire 3.5 foot length on each side?drueb Today, 04:24 PM
I would check the torque converter first but I'm not sure what test you could do for that. I have pretty much the same setup and vehicle, 04 2500 6.0Lsierra11 Today, 04:06 PM