Why 2003? They are nothing alike. Don't do that. There are 2007 and up vehicles that came with a 4L80 & T42, if you really feel the urge to go copying stuff out of a different file. Tuning is a process, not a thing where you change this and copy that and mess with that other thing for awhile until it runs real good.
Originally Posted by SiriusC1024
I hope you didn't mean LQ4/P59 in the 2007 Trailblazer. Unless you enjoy those 10-year-long projects that never ever run again.
That’s what worries me, getting it tuned correctly. I just would like to have something to refer back to. Even though it’s the same trans I guess the tunes are completely different.
As for the LQ4 stuff, I wondered if using the p59 and harness on the LS2/4l80 in the 07 would make anything easier. Just daydreaming lol.
Have you compared wiring diagrams/pinouts between your truck and a '07 Suburban LY6/4L80 to see all the changes you'll have to make, if you don't use the adapter harness (which just plugs in, btw, no wiring changes needed)?
I have compared 4l80e pinouts to mine and have a good grasp on that. The diagram I have didn’t specify the year of 4l80, would you suggest me trying to source one for that model year? Alvin’s harness will require some tubing as well won’t it?
Tubing = tuning? No more so than tuning shift speeds/pressures/gear ratio/tire size/etc. you'd do with any type of transmission.
I’m going to dive into this tomorrow or Tuesday. Got the drivetrain over and am hitting the odds and ends, waiting on the driveshafts. I stupidly decided to paint the car, so that was weeks off stress and no sleep. I will report back.
What’s the trick to get the tcm connector apart to re pin it? I’ve searched hi and low and I haven’t found any write ups on that. I also discovered the engine harness to IP connectors are different between the years, so one of the plugs need changed, I was able to find a pin out for both thankfully.
Working on wrote the new file to the ecm but I keep getting timed out though. I have a tender on the battery and the radio fuse is pulled. I wonder if it has something to do with the vin from the pcm being different than the bodies. Do I need to make the vins match somewhere? Do I need to disable VATS?
It’s timing out on the TCM, the ECM is completing the write. This last time the TCM got to 97% and timed out.
Once the ECM is complete can I go back and write the TCM by itself?
Last edited by Tonyorlo; 19 Hours Ago at 02:52 PM.
The ECM showed complete, so I tired just writing the TCM and it completed. No fuel pump and no crank though, I see the security light is on. I assume I need to change the VIN somewhere or delete vats?
Should I have used the 08s ecm?
Last edited by Tonyorlo; 16 Hours Ago at 05:18 PM.
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