Hi I have a 2011 Yukon Denali hybrid that has 117000 miles on it. Truck started having weird electrical issue. While driving the stock navigation system shuts off and restarts, the tpm, abs lights come on and the gauges all go down to 0 as if the car is off. The AC blows hot air as well after this. Door locks flick off, and the windows do not work until system resets itself. Could someone give me an idea what the issue could be. Replaced the 12v battery last week. Could it be battery cables, ignition switch?

 

re-tighten the battery cable the cable should sit all the way down the post
you could also have a bad ground wire

check the crimp on the positive cable mine was coming apart and caused a bunch of issues

 

thank you. so had mechanic installing new spark plugs, wires and ignition coils and he noticed that the truck had an old gps skip tracer from previous owner that wasn't removed and had loose wires. he removed the box and truck is back to running smooth. ended up installing new better 12v battery as well just to be safe.

 

good you got it running

 

Glad your guy figured it out, hey you better keep that mechanics ph number handy these old TwoModes have a lot of issues. Heck you may have his ph number memorized if you keep this thing for very long hahahahaha