Having problems with your 2004 Chevrolet TrailBlazer ?

How to change a thermostat n a 2004 chevy trailblazer

Posted / edited by AnonymousUser on : 12-04-2021

Answers :

Must remove the alternator and alternator bracket to access it. For the bottom bracket bolt, try using a ratcheting wrench for easier access, because there are A/C tubes there in the way. PITA job, but with patience it will go smooth. You may even replace the coolant temperature sensor while you're in there, it's 2 inches above the thermostat. You want this engine to be at a constant 210 degrees.
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