Potential fix for 8-speed and 5.3L

mookdoc6 · April 12, 2017

Lol. I love these threads. Ain't nothing wrong fellas. It's 100% normal.

It used to be "normal to pull off to the side of road and stop driving after a flat" "Now it's 100% NORMAL to drive on it until the next town or service station" LOL I love these forums.........Some people don't switch vehicles like underwear so RELAX

AllTerrainX · May 2, 2017

Guys, just got back from the dealer. I had to get a software update for a recall on the 4wd selector. Something about getting stuck in 4-hi. I mentioned the issues I've been having with the transmission. Mainly harsh downshifts and hesitation taking off from a stop, issues with partial throttle, crawling in traffic, etc. They performed a programming update. Google offered up this when I searched bulletin 4660350: https://www.repairprocedures.com/bulletins/document/16na412/4660350.html

Is this a new TSB? It says Mar 16, 2017. Could somebody with access pull the PDF and post it here? Looks like it says 2016s with the 8-speed and 5.3L.

Anyway, as far as results, it shifted great on my drive home! Knock on wood. Very excited for others to try it out.

Any updates on this? I might call the dealer and get it performed on my 2016.

16sierra · May 3, 2017

Any updates on this? I might call the dealer and get it performed on my 2016.

I wouldn't waste your time. Mine learned its previous bad habits and is just as bad as before. $50k piece of junk.

I drove a Ford the other day and it was as smooth as butter. I wish I still had my 2004.

Sir Dan · May 3, 2017

Any updates on this? I might call the dealer and get it performed on my 2016.

As 16sierra says, don't even bother with the new trans update. No change...after about 100 miles back to it's old tricks. I would get the transfer case fix done though.

AllTerrainX · May 3, 2017

I wouldn't waste your time. Mine learned its previous bad habits and is just as bad as before. $50k piece of junk.

I drove a Ford the other day and it was as smooth as butter. I wish I still had my 2004.

As 16sierra says, don't even bother with the new trans update. No change...after about 100 miles back to it's old tricks. I would get the transfer case fix done though.

I might just wait to get a Black Bear Tune then Seems like GM doesn't want to fix their issue with a $50K+ vehicle