Greetings -
I'm a new member but a long-time reader. I know that the transient complete loss of all electrical power has been discussed here, and I have searched the site for symptoms similar to mine.
My 2012 Chevrolet Suburban LT 4WD vehicle is in good repair and has a steady maintenance schedule. The battery is newer and recently tested. Outside of the described issue, occurring with increasing regularity, my Suburban runs well.
The symptoms:
I drive the truck for varying distances without trouble. I then park the vehicle and turn off the ignition. Upon restarting the engine, I can drive for a few hundred yards before the headlamps flicker: the engine sputters, the transmission "slams," causing bucking, and all electric power goes off. Turning the key has no effect. The door locks may go up and down on their own, and the needles on the gauges jump without any power coming back on. After three to five minutes, the power returns, and there are no drivability issues upon starting the engine. Upon parking the Suburban and allowing the engine to go cold, the engine will start, allowing me to drive for varying distances before the cycle described repeats itself.
No trouble codes are lodged in the system.
I checked all cables, grounds, connections, and electric components. One note is that after losing and then regaining "all" electrical power, the digital clock retains the correct time. I reviewed all existing Technical Service Bulletins (TSB) for the 2007-2014 model years without finding much related information. The sole pertinent note described some of the symptoms occurring because of a loose or damaged automatic transmission 16-pin connector. This was not the case in my situation.
I don't expect any replies, as several other posts on this issue list various possible solutions. I am only submitting this because some of my Suburban's conditions are unique. At this point, I believe my options are exhausted, so I will have to turn to a dealer$hip for vehicle diagnosis. I will post any information that they might give to me.
I'm a new member but a long-time reader. I know that the transient complete loss of all electrical power has been discussed here, and I have searched the site for symptoms similar to mine.
My 2012 Chevrolet Suburban LT 4WD vehicle is in good repair and has a steady maintenance schedule. The battery is newer and recently tested. Outside of the described issue, occurring with increasing regularity, my Suburban runs well.
The symptoms:
I drive the truck for varying distances without trouble. I then park the vehicle and turn off the ignition. Upon restarting the engine, I can drive for a few hundred yards before the headlamps flicker: the engine sputters, the transmission "slams," causing bucking, and all electric power goes off. Turning the key has no effect. The door locks may go up and down on their own, and the needles on the gauges jump without any power coming back on. After three to five minutes, the power returns, and there are no drivability issues upon starting the engine. Upon parking the Suburban and allowing the engine to go cold, the engine will start, allowing me to drive for varying distances before the cycle described repeats itself.
No trouble codes are lodged in the system.
I checked all cables, grounds, connections, and electric components. One note is that after losing and then regaining "all" electrical power, the digital clock retains the correct time. I reviewed all existing Technical Service Bulletins (TSB) for the 2007-2014 model years without finding much related information. The sole pertinent note described some of the symptoms occurring because of a loose or damaged automatic transmission 16-pin connector. This was not the case in my situation.
I don't expect any replies, as several other posts on this issue list various possible solutions. I am only submitting this because some of my Suburban's conditions are unique. At this point, I believe my options are exhausted, so I will have to turn to a dealer$hip for vehicle diagnosis. I will post any information that they might give to me.
