general problems of the 2023 GMC Sierra 1500 - part 2

Bose radio randomly goes to maximum volume and you cant turn if off. This has happened twice and nearly cause wrecks each time trying to get out of traffic to turn the vehicle off.

--unwanted reduction in the front hvac blower speed and loss of radio, auto ac not working as designed --driver seat vibrating as the lane departure warning activated; I had turned the seat vibrate function off on 25 June 2023. I then went into settings to turn the function off again, and the system would not allow to make the change, it stayed in vibrate function --the passenger front window will not go up automatically, had to hold the button to make the window go up all the way. I then had a message in the dic, that said, “open and close passenger door”. I did so, at the next stop, but the message stayed on the dic and the window still would not go up automatically with the button -- when the vehicle is operated and the ac is not on, just the fan, and windows down, and the auto temp set at 68 degrees, when at idle, there is an obvious increase in very hot air coming from the vents and stays that way until the vehicle is back in motion. Then it seems to adjust back toward normal outside air. During all this operation the recirculation is open to outside air --auto rain sensing windshield wipers; stops at full arc and hesitates during operation --driver side review mirror does not go back to preset 1 position, when put in reverse, both mirrors tilt lower, as I have set, but when put back into drive, the driver mirror does not fully recover until I push the 1 setting --dic message of key not in vehicle, even when the key is in vehicle and vehicle is in motion, the dic message stays on screen saying key not in vehicle --with ac in on position, cold air stops and very warm/hot air starts coming out for about 30-60 seconds, then cold air starts coming out again, happens during driving and stopped, at any speed --truck wifi does not connect automatically software not updated from gm- other safety items are affected --auto headlights --auto brakes --auto wipers --auto systems not working as designed.

Upon start up the hvac fan speed reduces by self and will not increase by own in auto mode.

I sent my vehicle to the dealer, brandywine GMC dealer in bradywine MD. To have my fluids topped off upon receipt of my truck the next day my truck broke down. I sent my truck back to the dealer where they said def was placed into the diesel tank by me, which was a lie. I filed an insurance claim because the dealer accused me of putting def into my diesel tank. The insurance company paid to have everything fixed, however shortly after receiving my car I was traveling the interstate and my speed was cut back to 15 miles per hour per the trucks computer, which almost caused my vehicle to be rear ended. I took the truck to alexandria va GMC because the codes were telling me that the injection system default , which brandywine was supposed to have fixed.

Sunroof glass shattered. This is the first summer for the truck. Travelling at ~75mph the sunroof glass shattered. Neither driver nor passenger saw any objects in the air. I was not travelling under an overpass. Over the last 2 months I have been awaiting repair I have tried various methods to cover the sunroof and all have failed. Some easily pop off. Others hold better, but when travelling at higher speeds (>50mph), the covering will bulge outward presumably from the pressure difference from outside to inside the cabin. My guess at root cause is a combination of pressure on the glass created by airflow over the truck at highway speeds, ~85degf air temperature, full sun load, and possibly stress of the roof (which is black).