Chevrolet Tahoe, GMT921 (USA / CAN)

Automatic transmission fluid capacity & service interval

Chevrolet Tahoe, GMT921 (USA / CAN) uses automatic transmission fluid with a capacity range of 4,7 to 5,7 liters. Service intervals include checking every 12 months and changing at 45000, 50000, 97500, or 100000 miles. The data covers 8 configurations.

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

TypeSpecifications
Tahoe 5.3 V8 (2012-2014)
  • Use: Normal
  • Capacity 5,7 liter
  • Change 97500 miles
  • Code: 6L80-E 6/1
Tahoe 5.3 V8 (2012-2014)
  • Use: Severe
  • Capacity 5,7 liter
  • Change 45000 miles
  • Code: 6L80-E 6/1
Tahoe 5.3 V8 (2009-2011)
  • Use: Normal
  • Capacity 5,7 liter
  • Check 12 months
  • Change 100000 miles
  • Code: 6L80-E 6/1
Tahoe 5.3 V8 (2009-2011)
  • Use: Severe
  • Capacity 5,7 liter
  • Check 12 months
  • Change 50000 miles
  • Code: 6L80-E 6/1
Tahoe 5.3 V8 (2008-2008)
  • Use: Normal
  • Capacity 4,7 liter
  • Check 12 months
  • Change 100000 miles
  • Code: 4L60-E 4/1
Tahoe 5.3 V8 (2008-2008)
  • Use: Severe
  • Capacity 4,7 liter
  • Check 12 months
  • Change 50000 miles
  • Code: 4L60-E 4/1
Tahoe 5.3 V8 (2006-2007)
  • Use: Normal
  • Capacity 4,7 liter
  • Check 12 months
  • Change 100000 miles
  • Code: 4L60-E 4/1
Tahoe 5.3 V8 (2006-2007)
  • Use: Severe
  • Capacity 4,7 liter
  • Check 12 months
  • Change 50000 miles
  • Code: 4L60-E 4/1

Additional Notes

  • The Chevrolet Tahoe GMT921 5.3 V8 carries a transmission fluid capacity of 4.7 liters for the 2006-2008 model years, a figure representing a service fill rather than a full overhaul capacity, as pan-drop service procedures typically displace only a portion of total system volume.
  • Starting with the 2009-2011 model years, the 5.3 V8 transmission fluid capacity increases to 5.7 liters, a difference of one full liter compared to the 2006-2008 specification, reflecting a change in transmission unit or pan design.
  • The 5.7-liter capacity carries forward unchanged through the 2012-2014 model years, maintaining consistency across the later production span of the GMT921 generation.
  • For the 2006-2008 model years, normal-use conditions call for a fluid change interval of 100,000 miles, while severe-use conditions reduce that interval to 50,000 miles, exactly half the normal-use figure.
  • The same halved relationship between normal and severe intervals applies to the 2009-2011 model years, with 100,000 miles under normal use and 50,000 miles under severe use.
  • The 2012-2014 model years shift to slightly different interval values: 97,500 miles under normal use and 45,000 miles under severe use, both modestly lower than the figures specified for earlier model years.
  • Across all model years in the 2006-2011 range, a 12-month fluid check interval is specified alongside the mileage-based change interval, adding a time-based maintenance trigger independent of accumulated mileage. No check interval by time is listed for the 2012-2014 rows.
  • Severe-use classifications generally account for operating conditions such as frequent towing, trailer hauling, extended idling, or repeated short-trip driving, all of which elevate transmission fluid temperatures and accelerate fluid degradation relative to normal driving cycles.

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