My 2000 jeep grand cherokee is overheating when i drive less than one mile and the coolant light is going off. i replaced the thermostat and checked the coolant level (which is fine) but it is still overheating. what can i do?

I'm not really familiar with JEEP mechanics but if you've replaced your water pump and it's still overheating with full water/coolant level, you should check the thermostat; when it fails, it's a common cause or overheating in all kind of cars

I'm attaching some links to Youtube tutorial about replacing thermostat in a Jeep but you can expand your Google search using terms
Youtube replace thermostat JEEP Liverty

https://www.youtube.com/watch?v=Y3NpLdG993U

Jeep 4 0L straight six thermostat replacement

Thermostat Replacement Overheating fix Part 1 Jeep


How To Change the Thermostat in Jeep Wrangler


2002 Jeep Grand Cherokee Thermostat Replacement

Replacing the radiator thermostat in any Jeep Cherokee Jeep liberty Jeep...

Did you replace the thermostat also?

Did you bleed all air from the system? Is it actually overheating or is the light just coming on? If so, replace the temperature sending unit. If you are loosing coolant with no apparent leak then suspect a blown head gasket which will cause the engine to overheat. A compression test will verify this.

check for blockages in the piping, this may be blocking the flow of the antifreeze.
Also check the coolant you are using it needs to be a 50-50 ratio of coolant and water in most cases. Please go by the manual.

Doesn't sound as though you have overheating issues.
With a 196 thermostat, a vehicle is designed to run at 200 to 210,and you were putting it under a load on your trip.
I don't know why you would think about changing anything,unless you were doing some trouble shooting, and a test you were performing, indicated a failed component.
I would change the thermostat, as preventative maintainance every five years, and watch for the fans to be working after a trip of five miles or so.
Your A/C may have been switched off, by the various computer systems, to prevent overheating, or it may be starting to have it's own issues.

sounds like one of two problems your fan is not working properly or you radiator is particularly restricted

could be one of many problems,blocked radiator,stuffed thermostat,coolant leak etc etc,i would replace thermostat first if no leaks are present.

When was the last coolant change?
Under 2 years or 24,000 miles.

Change the thermostat and gasket first.

Use a 195F with pop-let protection.

A stuck/failing thermostat is a common cause of over-heating problem.

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To change the fan,the entire protector plastic has to come out.

Most likely you will break the push in locking pins.

Get few replacement push in locking pins before you start the job.

check coolant level check fan ,fan clutch(if elect fan sensor and proper function) ,belt for correct tension water pump -thermostat proper function,clogging radiator ,debris covering radiator

Generally this condition is the result of coolant loss, or failed thermostat. If coolant goes below cylinder head level, or thermostat remains closed,heat will stop working. Do not drive with this condition as excessive heat buildup in cylinder head can and will do serious damage to heads and or head gasket.
Find out where leak is and correct it. Change thermostat as it may also be damaged. Check for excessive steam from tailpipe or miss in engine, as these symptoms indicate a cylinder head problem.