On a 1994 Chevrolet 3500 with a 454 TBI (Throttle Body Injection) engine, the Intake Air Temperature (IAT) sensor is typically located in the intake manifold or the air intake duct, just before the throttle body. It may be found mounted directly in the air cleaner assembly or in the ductwork leading to the throttle body. If you are having difficulty locating it, consult the vehicle's service manual for a detailed diagram and specific location.
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