2004 JGC overheating problems

[dss56]

I know another overheating but need help.

6cylinder straight six.
Replaced the water pump last year
replaced thermostat 2 months ago
replaced the radiator 2 months ago replaced last year also,

Well when you come to a stop or idle for a bit the car will stare to get hot.
If air cond is on it will get into the red zone hot hot hot.

I checked the fan and seemed to not work so I checked for voltage on connector and to see if the was ok.

I unplugged the connector and checked for voltage, seem to get on one side of the 3 pin plug.

I tried to hot wire the fan and used the middle pin as ground.
I was able to get the fan to spin but made a small grinding noise.
I tried the middle pin grnd and power to the other pin and nothing, seems there is low but no high speed fan and like I said the grinding noise.

I connected the plug and started the car and waited for the temp to rise and now the fan turned on but seems to be low rpm and really cant hear the fan, you can see it but looks slow.

My questions are.
on the six straight 2004 is there suppose to be 2 speeds?
On this vehicle the relays are in the black box next to battery. I swapped them same results.

Does this sound like the fan needs to be replaced with the noise, no high speed and to seems the fan is spinning slow when the car is running and getting hot.

thanks