Buick LaCrosse, P2XX (USA / CAN)

Differential fluid capacity & service interval

Buick LaCrosse, P2XX (USA / CAN) differential fluid capacity ranges from 0,35 to 0,9 liters. Service intervals include changes at 75000 and 150000 miles. The data covers 3 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
  • LaCrosse 3.6L V6 VVT AWD (2018-2020)
  • Rear
  • Use: Normal
  • Capacity 0,9 liter
  • Change 150000 miles
  • LaCrosse 3.6L V6 VVT AWD (2018-2020)
  • Rear
  • Use: Severe
  • Capacity 0,9 liter
  • Change 75000 miles
  • LaCrosse 3.6L V6 VVT AWD (2018-2020)
  • Rear, clutch
  • Use: Normal
  • Capacity 0,35 liter

Additional Notes

  • The Buick LaCrosse P2XX with the 3.6L V6 VVT AWD carries a rear differential fluid capacity of 0.9 liter, which represents a service fill volume typical of a compact rear drive module rather than a traditional open differential housing.
  • Under normal use conditions, the rear differential fluid change interval is set at 150,000 miles, reflecting a long-life service expectation for standard driving patterns.
  • Under severe use conditions, the same rear differential fluid change interval is reduced to 75,000 miles, exactly half the normal interval, indicating that demanding driving conditions accelerate fluid degradation at a proportionally significant rate.
  • The rear differential clutch pack on the 3.6L V6 VVT AWD carries a separate fluid capacity of 0.35 liter, which is distinct from the 0.9 liter rear differential fill and reflects the smaller, dedicated volume required for the clutch pack assembly within the AWD rear drive unit.

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