This suv has 195000+ miles the temp always runs 195 but startin in may the temp goes above 220 if I turn the a/c fan down to 2 the temp will drop to about 210 my wife is ready to scrap this trailblazer you cannot idle for 2 minutes at a light...please help me ..thank you

I'm fairly sure what you described is normal operation.
The thermostat opens at 195-197 degrees and the radiator fan kicks on around 225 degrees. So the normal range is between those numbers. And the coolant tank would rise when you turn the engine off because it stops flowing.
As long as the temp stays under 220 and you are not losing coolant you should be ok.

Not necessarily. The vehicle, in motion, has enough air flow through the radiator that the fan is usually not needed. The fan will run if the vehicle sits and idles for a while and the coolant temp rises since there is no air flow through the radiator. If you are worried about fan operation, there are two things to check. The fans will ALWAYS come on if the A/C is turned on. That is because the fans pll air through the A/C coil in front of the radiator. Air must flow through that at all times or pressure in the A/C lines will get too high. So test that circuit simply by running the engine and turning on the A/C. If the fans run, that part works. Now turn the A/C off. Let the engine run until the temp gauge gets to around 200-220 degrees F. The fan should come on about this time and run until the temp drops to about 190. This cycle will continue to keep the coolant from getting too hot. If the temp gauge gets into the red area and the fan has not come on, shut down the vehicle immediately to prevent engine overheating, and then troubleshoot that portion of the fan circuit.

Not sure I am with you on this. The cooling system is designed to run between 190 and 210 as a normal range. Above 210 and the radiator fan should start up. Anything over 230 is considered Hot.
Is the radiator fan coming on around 220 degrees ?

The sensor for the gauge could be faulty.
The thermostat could also be faulty, there is a small window between the thermostat opening at 195 and the coolant boiling at 220.

If there is bubbles occurring even inside the top part of the radiator (where you have the coolant put in), you may have a leak on your head gasket. You may be loosing coolant through the engine.

This is most likely 2 problems. The ABS/Brake light and speedo issue will be the speed sensor located in the read differential housing. The temp guage issue (and I'm assuming this is at idle) could be thermostat or temp sending unit. The fluctuation is causes by the electric cooling fan cycling on and off to control the temp. However, most of the time this fluctuation should be from about 195 - 220 degrees.

is the a/c high side pressures between 220 psi and 250 psi at idle? if the pressures are higher than this your condenser may be clogged with debris. check the fins on the condenser to make sure it is allowing enough air flow through to the radiator.

220 degrees is normal operaing temperature for your car. The thermostat does not open until 195 degrees and the fans don't come on until 126 to 128 degrees. If it gets over 129 degrees and the fans have not turned on then the cooling fan system is the cause of the problem. (cooling fan, cooling fan temp switch, cooling fan relay, etc.)

A lot of cars have the fans running after the fact, they just cool down the temp a little, have you checked your coolant lately? Keep an eye on the temp gage on the dash, make sure it doesn't go very far, It should be very constant when running.

You have 2 fans. One if the temp goes above 195 degrees and the other comes on when the temp reaches 220 or 240 degrees. When the AC is running usually both fans run.