Cadillac XT6 C1XX

3.6L V6 with direct injection and variable valve timing — the most refined iteration of GM's 3.6 family. 310-335 hp depending on calibration. Timing chain issues from earlier versions (LLT/LFX) largely resolved. Water pump remains a known wear item past 80k miles. Thermostat housing prone to cracking. Oil consumption possible at higher mileage but less frequent than predecessors. Solid daily driver with adequate power reserves.

• !! Water Pump Failure (LGX) from 130,000 km

  Internal water pump fails past 80k miles — difficult access means high labor cost. Coolant loss leading to overheating if not caught early.

  Symptoms: Coolant warning, temperature rise, coolant loss, sweet smell in engine bay
  1,080–1,668 $
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• !! Thermostat Housing Cracks (LGX) from 100,000 km

  Plastic thermostat housing develops cracks — slow coolant leak. Typical past 60k miles. Housing replacement is relatively straightforward.

  Symptoms: Slow coolant loss, drips under vehicle, intermittent temperature warning
  400–900 $
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• !! Oil Consumption at High Mileage (LGX) from 120,000 km

  Piston rings let oil past at higher mileage — less frequent than LLT/LFX predecessors but documented past 75k miles. Check oil level regularly.

  Symptoms: Dropping oil level between changes, slight blue smoke under load
  2,500–6,000 $
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