Hummer h2 limo occassionally overheats

[pdsq99f4]

Make sure your fan clutch isn't just freewheeling in both directions. This could cause it to not pull enough air at idle. Just because you don't see coolant on the ground doesn't mean it's not leaking. Look around the oil pan to make sure the water pump gaskets aren't leaking down the front of the motor and the coolant just drying to the oil pan.