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Remove the proper amount of antifreeze from the radiator. Now grab the top radiator hose that is located on the passanger side and follow it into the engine. Remove the part that is located above the thermostat houseing (Camshaft Actuator Solenoid) Should only be two bolts. Now remove the two bolts holding the thermostat housing . Now remove the thermostat and replace with the new. Now reverse the procedure. Dont forget to ad fluid when complete. == == == == I'm not sure, but the GM Customer Assistance Center can definatly help you. Theres a girl named Jessica who would be able to answer your questions or send you to the right place to find the answers. Her number is 1-866-790-5700 ext 22157 Any Make or Model, as long as it is a GM vehcile don't hesitate to call her, she helped me out twice now with problems I've had with my Suburban.

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Q: How do you change thermostat on 2003 Chevy Trailblazer?
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