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Are you able to share the 2019 stock 8hp75 file you read? Thanks

I've tested with them before and unfortunately all the temp tables affect the points before or after the actual shift. What I would like to change is the actual slip time vs. temperature. Once...

To further clarify this is the ecodiesel platform.

Using HPT to tune the tcm in these trucks, I find the trans stays in "Warmup mode" maps 30/31 way too long. In colder weather it can take up to 45m for a trans temp of 60degC to be reached to exit...

Yes that would be helpful I agree. And I was able to resolve my above issue by pulling the TCM fuse, and flashing. After a meeting with tech support, I was able to flash without having to pull the...

Has anyone had issues writing back to the ECM after liscencing? I have support ticket 254017 open, and was told I'm getting the "unlicensed vehicle" issue because it's trying to write the TCM?
...

Setup is a 08 LY6 mated to a 2015 6L80.
I have flashed a 2010 ECM (SPS) with a L96 tune and adjusted accordingly for the LY6 differences..Engine runs great.

The trans is from a 2015 truck. I am...

replaced the harness with another one, issue went away.
It's surprising after all the test we did.
Regardless I'm going to tear it all down and see what could cause it.
I'm thinking a bad...

We tried all 3 suggestions with no luck, still losing the pedal

Thanks but I've checked all that, esp colors/location. It may be the ignition pin wire I described in my last post. It is titled for "EMC/THROT CONT" so hoping its the issue.

Both jumping the ground from the purple/brown APP wires and putting ignition voltage to accy serial wakeup didn't resolve the issue. Still no pedal and REP.

Last thing to try is wire up the PCM...

This could be exactly my issue then. The issues you have seen are related to APP codes also (or reduced engine power) ?

Per LT1swap they can be removed...so I'm pretty sure I did not connect...

Thanks for the info and advice. I ran new APP pedal wires when I had the truck in my shop, and nothing changed. I tried another APP pedal and same thing.
I'm wondering if its a bad APP plug....I...

I modified the factory harness. I'm not ruling out a harness issue, but here's what I've tried:

To rule out bad grounding (I've heard this could be issue) I cut the main ground on the ecm pin 73...

Yes the pedal, TB, and ECM are all for 2007.5 model year truck.

Pedal is ACDELCO 25832864.

ECM is 12597121
OS of the tune is 12714088
Seg 7 of the tune is 12605899
Seg 8 of the tune is...

Bump!

I did a swap harness for a 2007 4.8L with 4L60 (e38 & T42). I'm having an issue when ignition is put on APP/TB is working fine, but once started 9/10 times it goes into REP (reduced engine power) and...

I'm trying to tune a bone stock e78 6.0L truck engine to run with a older non-electronic transmission (700r4).

Under the TRANS tab:
I've left the "ECM Trans Type" to Auto. Not sure if I should...

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Has anyone figured out the settings for the e-fans on the e78 ecm?
I'm looking to have 1 fan turn on, for a L96 silverado.

I believe the pins are 17 and 58 (if someone can confirm which one to...

yes i didn't read both at the same time. I read them separatly (bench harness) so I ended up with 2 HPT files.
I was simply wondering if the mods could merge the files for me, but I guess not...

As the title implies, I read the ECM and TCM separately, so I have 2 .hpt files - one for each.

I licensed the ECM file with 2 credits, assuming the TCM would also get licensed.

I now...