Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
the exhaust temp sensor is usually mounted post turbo and a safe figure for continuous use is 1150 degrees with 1200 allowed intermittently
so its sounds like you may be fine to me
whats worth doing as a maintenance action though is a bottle of injector cleaner into the tank and also check that the fuel filter is clean and clear as both of these can increase exhaust temperatures
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