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Sorry I don't know the answer, but can someone upload a factory stock calibration? (with transmission tune!)
I don't see anything newer than 2018 in the tune repository...

This won't do it? It was set to 3,000 rpm on my 2012 Tahoe, set at 5,500 rpm on the '15 tahoe..
Have not tested..
145591

Awesome, I did fill out a ticket and they have responded already! I need to send some files to them. Will update.

Hooked up a Tech2, got OSS signal! Looked normal, steady.
Reprogrammed ECM with limiter source to GMLAN, still no signal in VCM scanner!?

BTW I have 4WD so I guess the OSS sensor is on the...

20 minutes doable with bt dieselworks autosync

Wow! Thank you Transgo Rob and blindsquirrel!

I will check into my OSS signal and get a better log!

It doesn't always miss recording 2nd gear, and I don't -notice- slipping in first...
Could...

I've noticed a few instances in VCM scanner, it does not show me in 2nd gear, yet the graphs indicate I should be in second (rpms drop, speed still climbs)
Is this a tuning issue? Or do I have my...

Good to hear, though I still haven't zero'd the slip as I'm still tweaking shift schedule!
210k on my 2012 5.3/6l80.

Here's my current tune.. 145370

I imported these 2018 settings for now.. ...

I take it you mean the torque converter clutch?

How about 0-50% throttle locked, all lock/unlock speeds and shift speeds higher than stock?
Should be no less reliable than stock I'm hoping.

I...

Thanks for the datapoints 5FDP and 2xLS1!

Stock converter.. Still have slip enabled.. figure 20 rpm slip is only one revolution every 3 seconds.
Updating to 15+ slip maps, still commands 20 slip...

Here is original (2012) torque adder and inertia tables..
145142

Next the 2018 maps..
145143

Is shift time a little slower on decels, but faster for accel?
3,4,5,6 maps identical other than...

Thanks for the tips! I did bump the 0-25% a TINY bit, and mostly blended it to a stock 2015 shift schedule.
Need to get on the highway more for the 5 and 6 tuning. So far they are both about 15mph...

My vehicle is a 2012 Tahoe, compared to a 2015 Tahoe and 2018 Silverado tunes.
I'm sure the OS's are different, as I cannot directly compare all maps, but many look similar.

Daily driver, so I'm...

Got it, thank you for the clarification! I feel much better about giving 0 slip a try (without messing with other pressure settings for now!)

Thinking about leaving some slip.. maybe in the lowest...

Ah, thanks!

I think I see it, Must be the time zone like you mentioned!

When you hit about 80% Throttle? And the requested lambda goes from 12.21 to 14.17 when you drop to 73.5% throttle?...

Apologies hjtrbo! Let's clear this up. I was comparing the 20rpm slip vs 0rpm.
Argument I've heard, the cover deforms under too high a pressure.

Perhaps I misunderstood this statement...

for me the log file only shows 9:17:xx to 9:27:xx!
Also does not show PE mode..

I'm new, so likely NOT ABLE to help, but wanted to take a look anyhow...

The '15-'18? 6l80 has some tuning differences.

I felt the same as ksherna3 regarding no lock in 4th. In addition to the heat, cruising was less pleasant with it unlocked. (letting off throttle to...

Wow! Thanks for the excellent information Robert! I have linked this thread to tahoeyukon.com forum, hope you do not mind.

Is there anyway to tell just how badly the PR valve maybe worn through...

www.btdieselworks.com

The AutoSync, with BCM programming can extend it to 21 minutes. Allows upto 2500 seconds with additional ECM tuning.
Many other nice features like DTC reader in dash,...

I notice when I load a 2WD vs 4WD tune, the shift schedule layout looks different. So what you're saying sound right to me..

Hello forum members, new here. (2012 Tahoe) 1 quick question if I may..

How much pressure on a stock 6l80 only locking in 5&6? (I might lock 4th)
Stock is 1.5 regulator gain and 26.69psi...

On my 2012 GMT900.. "Pattern Type" also says pattern A -> normal, and pattern -> B trailer.. but when looking at the actual tables (shift schedule, tcc) NORMAL is normal, and PATTERN A is Tow mode,...

I have heard everyone who uses a throttle pedal commander/booster device always seems to like it. So I was trying to recreate that in tune.. Until I hit REP the first time!

Is the "area rate...

Well it says this..

ECM] 33034 - Desired Throttle Area - RedPwr: Reduced Power Mode Desired throttle area based on pedal position and RPM or VSS (pedal to throttle map). WARNING!!! Modify this...