I have a 2006 Cherokee Jeep Laredo. Recently had

Sounds like you need a thermostat. Check your anti freeze level.

Check it out on you tube !

sounds like the key immobiliser try your spare.

Yes a bad water pump will definitely cause it to run hot. you'll probably be able to hear it as well as a whinning noise from the front of the engine. Also check for really low or incorrect fluid. jeeps are know for bad water pumps and leaky radiators. the heater pump is a seperate pump from the water pump. Also check for radiator fan opperation while the vehicle is stopped. If the fan is not coming on, it could be a fuse, relay, or intake air temp sensor.

you might want to check you cam shaft sensor amd also there is a different sensor under the distutor i had to replace both of these on my 95 jeep grand cherokee laredo

buy manual, check timing chain or belt

The center pully is the IDLER PULLEY.
It is also referred to as the TENSIONER.

It has a coiled spring that creates the belt tension. Replace it ($15) (and the belt) ($8).

Hope this helps!

Thats the water pump.

It's not an impossible job, but too long to write out instructions. I suggest that you get an inexpensive manual for your car (haynes is about $20) and follow instructions there. If you run into any specific problems, give me a shout! (just curious ...why are you changing the pump?)

i have a 2000 grand laredo jeep cherokee that is leaking fliud bad i think it the water pump how do i fix it ??