New to the forum and Need some help. 2015 Z71. My service 4wd came up on the display and got a mech at my work to check the code. He ...

New to the forum and Need some help. 2015 Z71. My service 4wd came up on the display and got a mech at my work to check the code. He told me what it was and called my dealer to make an app. The truck was locked in 4H and had to drive approx 9 hrs home. And asked them if there was anything to be concerned about having to make the drive on fairly dry roads, was told no. Took the truck in for service and told them about a grinding vibration noise from front end and was told it was fixed in update. And it wasnt. Went back and took the shop foreman for a drive and he stated it was a wheel bearing. Another day shot at the dealer to fix. Get my truck back and the noise is still there. Im thinking it is something wrong with front diff or stub shaft? Any ideas? Besides a different dealer for repairs? Lol.

Does this only happen during turns? What mode is your transfer case in right now? Don't look at the position of the switch, look at what's lit up on the switch.

If its in 2wd the front diff and or tcase and shaft are not engaged, if its in auto or 4wd hi or low and you hear it, its possibly one of the following, could be another bad bearing that had been installed or the other side has a bad bearing? what speeds does it happen? its hard to do a diagnosis on the internet, but it could be even a bad torque converter. but the fact it just started when this 4wd issue had occurred points to the front end. could be something as simple as a bad tire. hard to tell without more info

The dealer got the shift indicater to work but told there was no fix yet from gm. The only thing the dealer said was to make sure that the truck was shifted into 2 wd before turning it off to prevent the sensor from locking it in 4H again. The speeds it can be heard from about 20 kph to about upto 60kph then goes away. In 2 or 4 wd.

I would hope they at least reflashed your TCCM, the bulletin instructs the technician to do that and advise you there is no official fix for the 32 degree software issue.

Yeah they reflashed it 2xs lol. But it also makes the same noise when I put the factory tires on.