Radio Volume Issues

[Nastynate]

I am also having this same problem on my 2015 SIERRA. Gmc customer care is useless. They have ghosted me on two seperate occasions now I will not even bother contacting them on this issue. The volume goes all the way up on its own. I've tried everything. Truck was bought new by me, it has 120k miles now. I've replaced the transmission once at my cost because gm said it was fine...... had lifters replaced for the afm after leaving me stranded and losing 4 cylinders, a/c condenser replaced (bad welds), driver seat covers replaced twice for tearing (I'm only 200lbs), had to the dealer twice now for being stuck in 4 wheel drive to have computer reflashed, the rear right leaf spring came apart about 20k miles, the transfer case has so much play in it, clunks going in and out of gear. When doing my very first brake job at only 20k miles it was realized the calipers were installed in factory with absolutely NO GREASE on the caliper pins,  causing the premature wear. My mother has a Denali with the same radio as my sierra and it has already been replaced by dealer for around $2k. Been a gm guy my whole life and been happy with that decision but these new trucks are garbage. And gm customer care doest care at all...time to make a change. I'll bet the steering wheel controls are the issue here, probably in the steering column. Yay

[FlipzZz]

Not sure if anyone has the same problem as mine, but I fixed mine on 2018 gmc sierra

 

My volume could go up to 30 ish in volume, when I put it louder it would go down in volume. Has done this to me twice in the last few years.
 

The way I’ve solved this problem is connect my Iphone to the stereo, open Apple car play, goto maps, pick a destination, when she talks turn up the volume, then it fixes your music volume. Not sure why they intertwine with each other sometimes, when they are supposed to be separate.

 

hope this helps someone. 

Edited January 12, 2022 by FlipzZz
Insert truck info

[Honey Crisp]

2016 GMC Denali dualie-same problem with radio.  All of a sudden volume goes up & then down.   Red line shows how far volume is up & then a smaller red line continues from that red line.  Just turned truck off & turned auto volume off.  Volume works now.  So we will see as I have tried everything else!  Just found this website so thanks for advice!