Chevrolet Avalanche, GMT805 (USA / CAN)

Transfer case fluid capacity & service interval

Chevrolet Avalanche, GMT805 (USA / CAN) models utilize transfer case fluid with a capacity of 1,9 liters. Service intervals include checking every 12500 km or 12 months and changing every 83000 km. The data covers 2 configurations.

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

TypeSpecifications
  • Avalanche 5.3 V8 AWD (2001-2006)
  • Automatic
  • Use: Normal
  • Capacity 1,9 liter
  • Check 12500 km/ 12 months
  • Change 83000 km
  • Avalanche 8.1 V8 AWD (2001-2006)
  • Automatic
  • Use: Normal
  • Capacity 1,9 liter
  • Check 12500 km/ 12 months
  • Change 83000 km

Additional Notes

  • Both the 5.3 V8 and 8.1 V8 AWD configurations of the Chevrolet Avalanche GMT805 share an identical transfer case fluid capacity of 1.9 liters, which is a service fill figure associated with a transferbox unit rather than a full overhaul drain-and-refill of a disassembled assembly.
  • The 83,000 km change interval applies under normal use conditions for both engine variants, meaning standard on-road driving without the elevated stress of frequent towing, off-road operation, or extreme temperature exposure.
  • A check interval of 12,500 km or 12 months, whichever comes first, is specified for both the 5.3 V8 and 8.1 V8 AWD variants under normal use, establishing a routine inspection cadence well ahead of the full fluid change interval.
  • The 1.9-liter capacity figure is consistent across both the 5.3 V8 and 8.1 V8 AWD applications across the full 2001-2006 model year span, indicating no variation in transfer case fluid volume between the two engine displacements in the Avalanche GMT805 lineup.
  • The automatic transfer case designation noted for both configurations refers to an electronically or mechanically actuated unit that shifts without manual driver input, which is relevant context for understanding why a defined fluid capacity and scheduled service interval are specified rather than a sealed-for-life arrangement.

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