Buick Rainier (USA / CAN)

Transfer case fluid capacity & service interval

Buick Rainier (USA / CAN) requires transfer case fluid with a capacity of 1,8 liters. Service intervals include checks every 12 months and fluid changes at 80000 km or 50000 miles. The data covers 3 configurations.

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

TypeSpecifications
Rainier 4.2 24V AWD (2004-2007)
  • Use: Normal
  • Capacity 1,8 liter
  • Check 12 months
  • Change 80000 km
Rainier 5.3 V8 AWD (2004-2007)
  • Use: Normal
  • Capacity 1,8 liter
  • Check 12 months
  • Change 80000 km
Rainier 5.3 V8 AWD (2003-2004)
  • Use: Normal
  • Capacity 1,8 liter
  • Check 12 months
  • Change 50000 miles

Additional Notes

  • All three AWD configurations of the Buick Rainier share an identical transfer case fluid capacity of 1.8 liters, a figure that represents a service fill rather than a full overhaul volume, as service fills account for residual fluid remaining in the unit during a drain.
  • The 12-month check interval applies uniformly across the 4.2 24V AWD and both 5.3 V8 AWD entries under normal use conditions, meaning the fluid level and condition are to be inspected once per year regardless of mileage accumulated.
  • The Rainier 5.3 V8 AWD covering model years 2003-2004 carries a change interval expressed in miles at 50,000 miles, while the 4.2 24V AWD (2004-2007) and the 5.3 V8 AWD (2004-2007) both carry a change interval expressed in kilometers at 80,000 km, reflecting a unit-of-measurement difference between the two specification sets.
  • The 5.3 V8 AWD configuration spans two separate specification rows: one for 2003-2004 and one for 2004-2007. Despite sharing the same 1.8-liter capacity and 12-month check interval, the earlier row uses miles as the distance unit for the change interval while the later row uses kilometers.
  • The 2004 model year appears in both the 5.3 V8 AWD rows, indicating an overlap where the 2004 model year is covered by specifications expressed in both miles and kilometers for the fluid change interval.

Other Systems