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17/10/2023 2:41 pm
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I have a 2003 Chevy Trailblazer. It was running cold so I had a shop put a thermostat on it. After I picked it up it started running hot and the radiator cracked. I replaced the radiator. When I get on the highway and build up pressure it runs hot. It's showing a p0300 codes which is a misfire code. I can't figure out what is causing it to run hot.
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