Can somebody help, 6.0 out of a 2003 Chevy 2500hd4x4 into my 95 S10 , it has a standalone harness and the 4l60e, it idles fine at any temp but as soon as I put it into any gear it goes super low idle or just dies. Other than that it is almost perfect THIS IS DRIVING me bonkers I've tried two different runs and same thing hhhheeeeeellllpppp
WE can't help much without a tune file and logs of the problem.
Also we need to know what the fuel system is. Did you keep it a return style or what did you change?
Also what is your fuel pressure?
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.
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