Hi , how are you. These thermostats are a bit of a hard job but they can deffinately be done by a person with a bit of mechanical skill. I will give you detailed information how to replace the thermostat.It is located directly under the throttle body. Here's a tip if it does not state this in the manual. Remove the throttle body and you will have good access to the bolts. Do not remove the exhaust crossover pipe. If you are happy with this information please leave me positive feedback. Thanks Scott
P.S. - I am assumming you have a 3.1 l engine. If not let me know.
Engine Coolant Thermostat Replacement (3.1 L) Removal Procedure
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
Refer to Cooling System Draining and Filling .
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten Tighten the bolts to 25 N·m (18 lb ft).
Tighten Tighten the bolt to 16 N·m (12 lb ft).