Intermittent delayed shift

[Reyetwinger]

Hi. New to this forum and my truck. I have a new 5.3 with a 6 speed. 90% of the time I have no issue but once or twice a day if quickly shifting from reverse to drive the tranny will delay engaging drive for a second or two which results in what feels like it slipping and then banging into drive. I can't reproduce it on demand but it will occur on occasion. If I wait 2 or 3 seconds it will never happen but when backing out of a driveway or making a quick U turn it will sometimes surprise me by exhibiting this behavior. Like I said if trying to reproduce it I can quickly shift it all day in my driveway and there is no delay.....it seems to have a mind of its own. Has anyone else experienced anything like this, or have some input on what may be causing it? The truck is a 2019 Tahoe but I figured I would post this question here as there seem to be a lot more Silverado owners giving input than Tahoe owners. I had asked on another Tahoe forum and there wasn't much posting traffic there. Being the drive trains are the same I'm hoping I might have more luck here. Thanks in advance for any replies.

[reardiff]

I've noticed the same thing recently, not worth taking it in over just for that but if the solution is to wait an extra 2-3 seconds I'm Ok with that. 

[1SLOW1500]

yes it does and yes it can be changed. It is a a safety feature plus part of the table in other parts of the software for the TM table and commanded TB %. and rpm. I changed all my values. But it is best to come to complete stop foot on brake to shift. also as you could have guessed command affects afm/DOD. As stated the rpm values and fuel table change based on engine temp so funny things happen under 180*. 

[Reyetwinger]

Yeah I never shift it while its still moving in reverse. I've never had a vehicle that did this before. I can live with it but my concern is that down the line it will get worse being it shouldn't be doing it in the first place. I probably won't keep it past the 5 year warranty but you never know, and it would suck if it got worse and I had to pay out of pocket to fix it. Also if I ever decided to tune it I'm sure GM would blame the issue on that if it gets worse. Whether it's a minor nuisance at this point or not I feel something isn't right. I was hoping it might have been a somewhat common issue that could be fixed with a flash or something else non invasive.