Chevrolet Tahoe, GMT K2UC (USA / CAN)

Coolant capacity & service interval

Chevrolet Tahoe, GMT K2UC (USA / CAN) uses coolant with a capacity range of 16,5 to 16,8 liters. Service intervals include checking at 7500 miles and changing at 150000 miles or 60 months. The data covers 6 configurations.

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

TypeSpecifications
Tahoe 5.3 V8 (2018-2020)
  • Use: Normal
  • Capacity 16,5 liter
  • Check 7500 miles
  • Change 150000 miles/ 60 months
Tahoe 5.3 V8 AWD (2018-2020)
  • Use: Normal
  • Capacity 16,5 liter
  • Check 7500 miles
  • Change 150000 miles/ 60 months
Tahoe 6.2 V8 (2018-2020)
  • Use: Normal
  • Capacity 16,8 liter
  • Check 7500 miles
  • Change 150000 miles/ 60 months
Tahoe 6.2 V8 AWD (2018-2020)
  • Use: Normal
  • Capacity 16,8 liter
  • Check 7500 miles
  • Change 150000 miles/ 60 months
Tahoe 5.3 V8 (2017-2018)
  • Use: Normal
  • Capacity 16,5 liter
  • Check 7500 miles
  • Change 150000 miles/ 60 months
Tahoe 5.3 V8 (2015-2017)
  • Use: Normal
  • Capacity 16,5 liter
  • Check 7500 miles
  • Change 150000 miles/ 60 months

Additional Notes

  • The Chevrolet Tahoe GMT K2UC 5.3 V8 carries a cooling system capacity of 16.5 liters across all configurations spanning 2015-2020, while the 6.2 V8 configurations introduced in 2018 carry a slightly larger capacity of 16.8 liters, reflecting the greater displacement of that engine.
  • The 0.3-liter difference between the 5.3 V8 and 6.2 V8 cooling system capacities is consistent across both rear-wheel-drive and AWD variants of the 6.2 V8, indicating the capacity difference is engine-driven rather than drivetrain-driven.
  • The 5.3 V8 AWD and rear-wheel-drive variants share an identical 16.5-liter cooling system capacity for 2018-2020, meaning the addition of all-wheel-drive hardware does not alter the coolant volume requirement for that engine.
  • All configurations across the 2015-2020 range share a common coolant check interval of every 7,500 miles under normal use conditions, aligning the inspection schedule with typical oil service intervals on these vehicles.
  • The coolant change interval of 150,000 miles or 60 months applies uniformly to all listed configurations under normal use conditions. The 60-month time limit means a change is due at five years regardless of whether the mileage threshold has been reached.
  • A 150,000-mile change interval is characteristic of modern extended-life coolant formulations, commonly referred to as DEX-COOL or similar organic acid technology (OAT) coolants, which are designed to resist degradation far longer than older conventional green coolants.
  • The 5.3 V8 specifications appear across three overlapping year-range entries covering 2015-2017, 2017-2018, and 2018-2020, all with identical capacity and interval values, reflecting mid-cycle production or calibration revisions that did not affect cooling system specifications.

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