I am an original owner of a 2008 GX470 and it has the same flickering lights issue described here. Combined with the practically useless voice recognition system, the failed satellite receiver ($700 to replace a radio part??? Not on my watch!), the poor AM radio quality, the weak antenna reception, and the convoluted spare tire storage (try stabbing the crank at night on the side of a dark road), this will likely be my last Lexus. My wife just purchased a 2013 Ford F-150 pickup with the Microsoft SYNC navigation package and it blew me away with its far superior performance. A Ford!
I have tried to cut Lexus some slack but then I have to ask, "Why should I?" I paid top dollar for my GX470 and expected it to be a top quality vehicle. The one I got is not.
