Does some weird ****...first of all, and i have posted about this before, that the radio changes channels by itself, I am serious, you can be listening to cnn and it will change to like 102.3, it is very random, I notice that sometimes it will do it when I hit the garage door opener that is built into the truck it will change stations, but not always, I have been just driving around and it will just change stations by itself, there must be a gost in the the machine, also today when I was pulling in my driveway, and I have noticed this before, the tires will squeal, I think it Is the front tire, so I tried going from 2wd to 4wd to auto to 4 wd low range, and noticed a clunk, I thought that maybe something was messed up in the transfer case or transmission, after the clunk everything seemed to be alright, also the memory for the seats, when I had it set the seat would go ok, but the drivers side mirror would go all the way in, I tried unhooking the battery, still did it, then I adjusted the drivers mirror pushing on it with my finger and realized that the only way it would go all the way out was when I pushed the button to adjust the mirror and held the mirror with my finger it would go all the way out, like if you put the seat back all the way you could not adjust the mirror all the way out unless you pushed on it with you hand, also another thing is one day and only once, I tried to put the passenger side window down from the drivers side and it wouldn’t work, it would not go down, after shutting the truck off and the next day it worked OK, this is some weird **** and I wonder if there is an electrical problem, it sure seems like it.
I have a 1999 GMC sierra with a 106,000. Miles on it and have never had any of these weird electrical problems, should I just get rid of it, trade for a new one? The techs at the dealer can’t recreate the problem, also it fouled a plug at 12,000 miles and they also had to clean all the injectors, said they were all carboned up. Has anyone seen this kind of ****?

 

I can honesty say I have NEVER heard of one vehicle having so many Gremlins in it other then an early model Cadillac and it's only a 2011 !!!
I wouldn't normally say this... but unload it. I'm guessing this is only the beginning of a huge money pit as the truck gets older

Some of those symptoms are almost funny... I have never heard of a radio changing station by itself other then the movie "Christian"

I hope nothing bad happen if you try to trade it in.

 

It's most likely broken wires in the door jamb. I would suggest you take it in a leave it with them for a while and just gen a rental car from them. The mirror, window, and seat issue are all tied in at the DDM (Driver's door module). It controls your power mirrors, windows and seat. It sounds like you've got some bad wires, or the DDM needs an update, or the module its self is malfunctioning.

As for the transfer case, that's actually pretty normal for a 4x4 to make a clunk when it engages. That's the front axle lockin sleeve working to tie the front axle in when the differential starts getting power from the transfer case.

Also, GM has a bulletin out for your radio problems talking about inadvertently pushing the steering wheel controls when turning the wheel causing some spooky behavior in your volume and radio stations. So try and pay attention to see when your radio issues happen. Maybe the buttons are being pressed accidentally, which is why the technicians aren't getting it to happen. The window, mirror and seat issue though are all most likely being caused by wires or a bad module in your driver's door.

 

Oh no! I am deeply sorry to hear that you are experiencing some vehicle concerns. I would like to learn more about your vehicle issues and look into this for you. Private message me if I can be of any assistance.

Sincerely,

Jennifer T.
GM Customer Care

 

This is not the case, the radio will jump from a channel on favorite 1 to a channel on favorite 2, you can’t do this with the buttons on the wheel, I have tried it, it goes only to the next preset station.