Chevrolet Tahoe, GMT921 (USA / CAN)

Coolant capacity & service interval

Chevrolet Tahoe, GMT921 (USA / CAN) uses coolant with a capacity of 17,3 liters. Service intervals include checks every 12 months and changes every 150000 miles or 60 months. The data covers 4 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 17,3 liter
  • Check 12 months
  • Change 150000 miles/ 60 months
Tahoe 5.3 V8 (2009-2011)
  • Use: Normal
  • Capacity 17,3 liter
  • Check 12 months
  • Change 150000 miles/ 60 months
Tahoe 5.3 V8 (2008-2008)
  • Use: Normal
  • Capacity 17,3 liter
  • Check 12 months
  • Change 150000 miles/ 60 months
Tahoe 5.3 V8 (2006-2007)
  • Use: Normal
  • Capacity 17,3 liter
  • Check 12 months
  • Change 150000 miles/ 60 months

Additional Notes

  • The Chevrolet Tahoe GMT921 5.3 V8 carries a cooling system capacity of 17.3 liters across all listed model years from 2006-2014. A capacity at this level is typical of a full-size V8 truck-based SUV, reflecting the volume required to circulate coolant through a large-displacement engine block, cylinder heads, heater core, and radiator.
  • The 17.3-liter figure represents a service fill capacity, meaning the amount of coolant needed when refilling a drained system under normal service conditions, rather than a dry-fill or overhaul capacity that would account for residual fluid in components that cannot be fully evacuated without disassembly.
  • The change interval is rated at 150,000 miles or 60 months under normal use conditions. A 60-month interval corresponds to five years, which aligns with the extended-life coolant formulations commonly used in GM vehicles of this era, such as Dex-Cool, which are engineered to resist degradation over longer service periods than conventional green coolants.
  • A separate check interval of 12 months is specified alongside the longer change interval. Annual checks allow for monitoring of coolant concentration, pH level, and freeze point without requiring a full drain and refill, which is standard practice for extended-life coolant systems.
  • The cooling system capacity and service intervals remain identical across all four year groupings covering 2006-2014. The 5.3 V8 engine family used in the Tahoe GMT921 platform did not change in a way that affected coolant volume or service scheduling across those model years.

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