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I have a 2017 silverado 5.3 reg cab with the 6l80e transmission

Im In the process of converting it to the 8l90e transmission
I already have the complete harness off an 8spd truck and Tcm. My...

yes sir coil plugs wires injectors compression good new fuel pump check valve springs etc

2008 Silverado

throws dtc po300 and cyl5 misfire I done everything u can think of and still acts up
backfires during idle and then clears up
bogs down on the top end 4-4500 rpm range
...