Hey guys, i recently picked up an 09 Buick Lucerne Super with the high output northstar, and since day one I wondered why it shifts so early. I read the stock file, and it's set to shift at 6400rpm under WOT, 100 rpm over peak power. But for some reason it shifts much earlier than that, somewhere around 5600. I haven't touched anything on it yet, any ideas what could be causing this? Thanks in advance!
Post the tune.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
Okay i will on Monday when I can access my work laptop.
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