Here again with another update!!
It is now running, and has NO codes! We've been waiting for the driveshaft to be built, and just got it back today. My technician says he'd like to log around 100 miles on it to work out any miscellaneous issues that may pop up in tuning or otherwise.
Keep in mind, this is a 6.6 engine and a 6L90 trans...neither of which were ever meant to be in this vehicle, so hearing it run was pure music to my ears!!
The only issue we have left to deal with is the intake/throttle body. My ECM didn't seem to like the 6.6 throttle body, so we installed the 5.3 intake and throttle body on the 6.6 and it ran good with no codes. The intake on the 6.2 and 6.6 are identical part numbers from GM, but different throttle bodies. So I grabbed a throttle body from the 6.2 to see if we can get it talking with the 6.6 intake and my ECM.
I am attaching a few pics of the driveshaft differences, and one pic (all I could get) of the Suburban. Peep the MASSIVE difference on the slip yoke end of the driveshaft. This new one is beefy! It's made of 1/8" aluminum, and it's so much thicker than the stock, it sounds and FEELS metal. I'd hate to think how thin the factory shaft is. More details to come!!
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