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E38/t42 seeing if anyone has a stock tune for a 2009 5.3 silverado with 4l60e? thanks in advance

Lt4/8l90e engine os 12670948 trans os 24280477 when placed in manual first gear, transmission shifts normally. when placed in manual second, trans shifts normally. Are there settings i can...

I seem to be making some progress, but still having issues. Unsure if wiring related or internal trans. I now have a t42 tcm with OS 24239927. I also have added two wires to harness and moved a few...

trans has 17 pins, harness has 15

where would I find a stock tune for 2009 Yukon tcm? (t42)

Right on, thanks for the info. I appreciate it.

thank you for reply. so my best bet is to look for another tcm? out of an 09 ? Or is current tcm programmable to work? thanks again

Having some trouble with data/trans in limp mode. This is a 72 blazer that came into shop to finish for customer. harness is made by Modern vintage.(still waiting on a reply from him about wiring...