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Is there a fuel pressere switch on 1999 Chevy tohoe?

No, a 1999 Chevy Tahoe does not have a dedicated fuel pressure switch in the same way some other vehicles might. The fuel system monitors fuel pressure indirectly through other sensors and the PCM (Powertrain Control Module). Low fuel pressure is detected through the PCM monitoring fuel rail pressure via the Mass Airflow Sensor (MAF), oxygen sensors and engine performance. If the pressure is too low, the PCM will usually trigger a check engine light and may put the vehicle into a limp mode. There's no single switch that directly cuts off fuel supply based on pressure.
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