01 Cadillac overheating and having no power like it has a governor on it

What model Cadillac ? Any messages on DIC - driver information center ?
ENGINE COOLANT HOT, IDLE ENGINE - 44
Engine Coolant Indicators
ENGINE HOT-AC OFF - 16
Engine Coolant Indicators
ENGINE OVERHEATED, STOP ENGINE - 42
Engine Coolant Indicators
ENGINE POWER REDUCED - 41
Reduced Engine Power Indicator
Do the cooling fans come on ?

Engine Coolant Indicators
Engine Coolant The IPC illuminates the engine coolant indicator and sends a class 2 message in order to activate an audible warning when the following occurs:
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The IPC determines that the coolant temperature is greater than 128°C (262°F). The IPC receives a class 2 message from the PCM indicating the coolant temperature.

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The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.

The IPC turns OFF the engine coolant indicator when the engine coolant falls below 125°C (257°F
ENGINE OVERHEATED/STOP ENGINE - 42 The IPC illuminates the ENGINE OVERHEATED/STOP ENGINE - 42 indicator in the DIC and sends a class 2 message in order to activate an audible warning when the powertrain control module (PCM) detects that the engine temperature is above the normal operating range. The IPC receives a class 2 message from the PCM requesting illumination.

The engine is swelling because of the over heating. Stop using it !!!!!!!!! Gotta fix cooling system lest you seize the engine.