Chevrolet Tahoe, GMT K2UC (USA / CAN)

Differential fluid capacity & service interval

Chevrolet Tahoe, GMT K2UC (USA / CAN) differential fluid capacity ranges from 1,5 to 2,6 liters. Service intervals include checks every 7500 miles. 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)
  • Rear
  • Use: Normal
  • Capacity 2-2,6 liter
  • Check 7500 miles
  • Tahoe 5.3 V8 AWD (2018-2020)
  • Front
  • Use: Normal
  • Capacity 1,5 liter
  • Check 7500 miles
  • Code: (4x4)
  • Tahoe 5.3 V8 AWD (2018-2020)
  • Rear
  • Use: Normal
  • Capacity 2-2,6 liter
  • Check 7500 miles
  • Tahoe 6.2 V8 (2018-2020)
  • Rear
  • Use: Normal
  • Capacity 2-2,6 liter
  • Check 7500 miles
  • Tahoe 6.2 V8 AWD (2018-2020)
  • Front
  • Use: Normal
  • Capacity 1,5 liter
  • Check 7500 miles
  • Code: (4x4)
  • Tahoe 6.2 V8 AWD (2018-2020)
  • Rear
  • Use: Normal
  • Capacity 2-2,6 liter
  • Check 7500 miles

Additional Notes

  • The Chevrolet Tahoe GMT K2UC rear differential capacity is listed as a range of 2 to 2.6 liters across all rear differential configurations for 2018-2020. A capacity range rather than a fixed value typically reflects variation between differential housing designs or axle ratio variants, where the actual fill level is determined by the overflow plug method rather than a fixed volume target.
  • The front differential on AWD-equipped Tahoe 5.3 V8 and 6.2 V8 models carries a fixed capacity of 1.5 liters for 2018-2020, which is notably lower than the rear differential range. Front differentials on full-size SUVs are generally smaller units, and the fixed capacity value indicates a more consistent housing design with less variation across configurations.
  • All six differential configurations across the 2018-2020 Tahoe GMT K2UC are assigned a normal use condition, with a check interval of 7,500 miles. A check interval, as opposed to a change interval, means the fluid level and condition are inspected at that mileage rather than automatically replaced.
  • The rear differential capacity of 2 to 2.6 liters applies equally to both the 5.3 V8 and 6.2 V8 engine variants, in both standard and AWD configurations, for 2018-2020. The shared rear differential capacity range across different engine outputs suggests the rear axle assembly is common between those powertrain options.
  • AWD configurations for both the 5.3 V8 and 6.2 V8 Tahoe add a front differential with a 1.5-liter capacity, which is absent from the non-AWD rear-wheel-drive variants. The presence of a front differential entry is therefore a distinguishing structural difference between AWD and non-AWD service requirements in the 2018-2020 model range.

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