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Here is a log when I went into REP

So I must have something wrong in the throttle section from what I can gather. Here is my latest tune. I am using the 5.3 ecu, flashed with 6.2 engine settings. Using the 5.3 throttle body, 6.2...

Well I thought everything was good. Went into REP mode today with only code P0606. I was accelerating on to the freeway, as it downshifted and throttle increased that's when it happened. Couldn't...

My problem was I was using the 5.3 gas pedal/TAC. Swapped to the 6.2 and all is good. Now on to improving the shifting....

Code thrown is P0300 random misfire detected (permanent) and P0606 ECM/PCM Processor (Pending)

one setting I did not change was the tach output. The 5.3 was set to serial and the 6.2 to crank. I assumed this had to remain serial but maybe I am mistaken? Should I change it to crank?

I managed to get a 2011 GMC Yukon XL Denali stock tune off the repository. Runs a lot better now but still get reduced power mode nearing Wide Open Throttle. Any ideas?

Hi new to the group, I just finished swapping in a 6.2 in my 2011 Yukon xl. The 6.2 came with the pcm so I copied all of the engine info over to the 5.3 pcm. Truck idles and drives ok but if you...