You can try the widely available GM IAT,GM P#25036751 and mating connector is GM P#12102620 or Napa P# ECHTSC300.If you look around you can find these for like $10-$15 with the connector.Not a perfect match though, it will read about 5-8 deg F hotter than actual, but that shoudn't make much difference.This should go before the turbo.
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