general problems of the 2009 GMC Sierra 2500

When I am driving in town I have an indication message that comes up and says engine power reduced.

Receiving a "service trailer brake system" message while in motion on both highway and city streets when applying brakes both with and without tow\haul mode engaged. There is a recall notice #14515 on this vehicle and the NHTSA site says that all recalls have been performed. What am I to do?.

The door lock actuator on the driver's door will not work or only partially work at times. Sometimes it works, sometimes it does not work and some times it half engages so the door can be half way opened, but the latch is still engaged so it cannot be opened all the way. My concern is that the door will not be locked when I think it is if I depend on the electric lock. It doesn't matter if I use the keyless entry or the electric button on the interior if it's not working, neither operate the lock. I am concerned about theft of personal belongings, or worse, my entire vehicle if the actuator does not lock the door as intended. If the electronic portion doesn't work and I have left the vehicle running while locked, I must use the keyless entry to unlock the other doors and enter the vehicle via another door and reach over to manually unlock my driver door. Another concern is that the others will stop working as the driver door has and I will not be able to get into my vehicle. These scenarios have presented themselves after the vehicle has been sitting, after a short or long drive as well. There doesn't seem to be any time that you are safe from it not occurring.

I have a 2009 GMC Sierra 2500 with 39,200 miles. My door lock actuator quit working, so my door no longer automatically locks and unlocks which I consider to be a safety hazard. I noted on-line that this seems to be a very common problem in GMC trucks, tahoes, and suburbans - and I even have friends and family members that have had the very same problem with their gm trucks. Because this is so very common, and to me is a safety issue, it seems like gm should be addressing this. I inquired with the dealer, and the cost for a single door lock is well over $200. Based on what I've been reading, I can expect the remaining locks to go out over time. I respectfully request that NHTSA look into this matter as I believe it is affecting many others and is a safety hazard.

At approximately 65,000 miles the passenger side door lock actuator quit working. The lock does not operate with the automatic door lock on the driver side door lock function or the keypad. At approximately 110,000 miles the rear driver side door lock actuator also quit working. This is a highly unsafe situation on many scales especially since there are no keyholes on those doors.