[atoyota4x4]

If you figure out the overheating issue, let me know. Mine has been doing it since this past winter. Would always do it on very cold days, below freezing. Now its doing it when its really hot out, 85 and above. Between those times, not problems. I tried 2 t-stats and everything else I could thing of. Very strange problem these 3.5L have and NO ONE can give me and answer to what is causing this. There is never a rhyme or reason because sometimes when its hot out, it runs normal. Sometimes having the AC on causes it to get hot, then the next time it makes no difference. I have had it to the GM dealer and to a cooling specialist and neither could get it to overheat. It just was one of those days when it decided to act normal. Its like they know when the mechanic is looking them over. Very frustrating

I told my wife, drive it until it blows up or until I can find a cure.