Chevrolet Avalanche, GMT805 (USA / CAN)

Automatic transmission fluid capacity & service interval

Chevrolet Avalanche GMT805 uses automatic transmission fluid with capacities ranging from 4,7 to 12,8 liters. Service intervals include checking every 6 months and changing every 100000 miles. The data covers 8 configurations.

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

TypeSpecifications
Avalanche 5.3 V8 (2001-2006)
  • Use: Normal
  • Capacity 10,6 liter (Overhaul capacity)
  • Capacity 4,7 liter (Service fill)
  • Check 6 months
  • Change 100000 miles
  • Code: 4L60-E 4/1
Avalanche 5.3 V8 (2001-2006)
  • Use: Normal
  • Capacity 12,8 liter (Overhaul capacity)
  • Capacity 7,3 liter (Service fill)
  • Check 6 months
  • Change 100000 miles
  • Code: 4L80-E 4/1
Avalanche 5.3 V8 AWD (2001-2006)
  • Use: Normal
  • Capacity 10,6 liter (Overhaul capacity)
  • Capacity 4,7 liter (Service fill)
  • Check 6 months
  • Change 100000 miles
  • Code: 4L60-E 4/1
Avalanche 5.3 V8 AWD (2001-2006)
  • Use: Normal
  • Capacity 12,8 liter (Overhaul capacity)
  • Capacity 7,3 liter (Service fill)
  • Check 6 months
  • Change 100000 miles
  • Code: 4L80-E 4/1
Avalanche 8.1 V8 (2001-2006)
  • Use: Normal
  • Capacity 10,6 liter (Overhaul capacity)
  • Capacity 4,7 liter (Service fill)
  • Check 6 months
  • Change 100000 miles
  • Code: 4L60-E 4/1
Avalanche 8.1 V8 (2001-2006)
  • Use: Normal
  • Capacity 10,6 liter (Overhaul capacity)
  • Capacity 4,7 liter (Service fill)
  • Check 6 months
  • Change 100000 miles
  • Code: 4L80-E 4/1
Avalanche 8.1 V8 AWD (2001-2006)
  • Use: Normal
  • Capacity 10,6 liter (Overhaul capacity)
  • Capacity 4,7 liter (Service fill)
  • Check 6 months
  • Change 100000 miles
  • Code: 4L60-E 4/1
Avalanche 8.1 V8 AWD (2001-2006)
  • Use: Normal
  • Capacity 10,6 liter (Overhaul capacity)
  • Capacity 4,7 liter (Service fill)
  • Check 6 months
  • Change 100000 miles
  • Code: 4L80-E 4/1

Additional Notes

  • The Chevrolet Avalanche GMT805 5.3 V8 carries two distinct automatic transmission overhaul capacities across its 2001-2006 configurations: 10.6 liters and 12.8 liters. An overhaul capacity represents the total fluid volume required when a transmission is fully disassembled and rebuilt, accounting for all internal passages and the torque converter being completely drained.
  • The service fill capacity, which reflects only the fluid volume needed after a routine drain-and-refill without a full teardown, is listed at 4.7 liters for the 5.3 V8 configuration paired with the 10.6-liter overhaul unit, and 7.3 liters for the configuration paired with the 12.8-liter overhaul unit. The gap between service fill and overhaul capacity in both cases is substantial, illustrating how much fluid remains trapped in the torque converter and valve body during a standard service.
  • The 8.1 V8 configurations, both two-wheel-drive and AWD, are listed exclusively with a 10.6-liter overhaul capacity and a 4.7-liter service fill. No 12.8-liter overhaul variant appears for the 8.1 V8, in contrast to the 5.3 V8 which carries both capacity variants.
  • All configurations across the 5.3 V8, 5.3 V8 AWD, 8.1 V8, and 8.1 V8 AWD share a uniform fluid check interval of every 6 months under normal use conditions.
  • The fluid change interval is set at 100,000 miles under normal use for all listed configurations. At that mileage threshold, automatic transmission fluid has typically undergone significant thermal and oxidative degradation, making the interval a long-service specification rather than a frequent-maintenance one.
  • The AWD variants of both the 5.3 V8 and 8.1 V8 share identical automatic transmission fluid capacities and intervals with their two-wheel-drive counterparts. The AWD drivetrain does not alter the transmission fluid specifications in any of the listed rows.

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