2010 Cadillac CTS Owner's Manual - Page 129

Instruments and Controls 4-19 Engine Speed Limiter This feature prevents the engine speed from reaching an unsafe level. If the level is too high, the throttle closes or limits the fuel supply until the engine speed returns to a safe level. Throttle operation and fuel supply returns to normal when engine speed is lowered. For the CTS-V, the tachometer tracer lights flashes prior to reaching engine speed limit. The tracer lights also flash on automatic transmission vehicles while in the DSC or Tap Shift modes. Engine Oil Pressure Gage Canada United States For vehicles with an engine oil pressure gage. It shows the engine oil pressure in psi (pounds per square inch) when the engine is running. Canadian vehicles indicate pressure in kPa (kilopascals). Oil pressure may vary with engine speed, outside temperature and oil viscosity, but if readings are outside the normal operating range, the oil pressure light will come on. See Engine Oil Pressure Light on page 4‑30 for more information.