8 speed transmission software flash

[#1taho]

Have you checked wheel balance ?
What tires came on it ? Bridgstones?


If the truck sat for a bit the bridgstones get flat spots and will cause what you are describing.

 

[nrcpharmd]

It had Yokohama tires, I'll have the dealership check the balance on them. It doesn't happen all the time, today it only started when I was getting to the dealership to drop it off.


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[#1taho]

I feel for those of you that have spent the big money on a 2015 and have to put up with these problems. And still no cure.
Yokohama is a good tire. I had them once and had good luck.

 

[nrcpharmd]

I'm pushing for them to replace the transmission on it. I have a pretty good relationship with the dealership here, walked in, they looked at few items, got me into a rental, and they were going to let me know later on about what's going on. Tires for most part are okay, except for getting a screw in it after picking up Saturday. Easy enough fix.


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[#1taho]

Hope it works out for you.

 

[jl449]

I went though 2 transmissions before they got it right. Good luck!

 

[nrcpharmd]

Just got the call, tcc being replaced, gm has my XL on lock until it's replaced. Thankfully the dealer put me in a Tahoe for the mean time. Let's see what this does. Any word on if getting the tcm and ecm tuned would have any effect on this issue? I have my autocal from my old Tahoe's BBP tune, tempted to just do that. Thoughts?


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[jenielsen]

The transmission reflash is to fix a hard slam into gears after the vehicle had sat for period of time, say overnight in your garage. Mine would slam into reverse in the morning after sitting when I was putting from park to reverse. The reflash fixed it immediately. Right, wrong or indifferent, because I had over 36K on it, I had to pay the technician time for the reflash.